A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 50-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 110 rad/s2. What is the mass of the disk?
Answers
Answer:
Torque = I α = 1/2 M R^2 α where α is the angular acceleration
Torque = F R where F is applied to a distance R from center
F R = 1/2 M R^2 α
M = 2 F / (R α) = 2 * 50 / (.15 * 110) = 6.06 kg
Related Questions
Describe 2 potential problems or limitations of ratio
analysis.
Answers
2. Overlooking External Factors: Ratio analysis primarily focuses on internal operations of a company, but there are various external factors like market conditions, industry trends, and economic cycles that can significantly impact a company's performance. These factors might not be reflected directly in the financial ratios, thus potentially leading to an incomplete understanding of the company's overall situation.
On a weed-cutting device, a thick nylon line rotates on a spindle at 3000 rpm.
a. Determine the angular speed.
b. Determine the linear speed (to the nearest inch per minute) of a point on the tip of the line if the line is 5 in.
Circular Motion:
How fast a body turns is defined by its angular speed (ω)
and how fast that same body is moving along its circular path is called linear or tangential speed (vt). The angulr speed is measured in radians per second or the product of 2π and the frequency (f). While the linear speed is the product of the angular speed and the radius (r).
Answers
a. The angular speed of the rotating nylon line is 314.16 radians per minute.
b. The linear speed of a point on the tip of the line is approximately 2617 inches per minute.
a. What is the angular speed of the rotating nylon line?The angular speed of the rotating nylon line can be determined by converting the rotational speed from revolutions per minute (rpm) to radians per minute.
Since one revolution is equal to 2π radians, the angular speed is calculated as 3000 rpm multiplied by 2π, resulting in approximately 314.16 radians per minute.
b. How fast is a point on the tip of the line moving in inches per minute?To find the linear speed of a point on the tip of the line, we need to multiply the angular speed by the radius of the circular path. Given that the line is 5 inches long, the radius is half of that, or 2.5 inches.
The linear speed can be obtained by multiplying the angular speed of 314.16 radians per minute by the radius of 2.5 inches, resulting in approximately 785.4 inches per minute.
Rounding to the nearest inch per minute, the linear speed of a point on the tip of the line is approximately 2617 inches per minute.
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An 85 kg clock initially at rest on a horizontal floor requires a 680 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 540 N keeps it moving with a constant velocity. Find μs and μk between the clock and the floor.
Answers
A force of 680 N is required to get the clock moving, so the maximum static friction is also f ˢ = 680 N. The clock is at rest, so the net vertical force acting on it is 0, and by Newton's second law,
n - mg = 0
where
n = magnitude of the normal force
m = 85 kg = mass of the clock
g = 9.8 m/s² = magnitude of the acceleration due to gravity
So we have
n = mg = (85 kg) (9.8 m/s²) = 833 N
which means the static friction f ˢ is such that
f ˢ = µ ˢ n
Solving for the coefficient of static friction gives
µ ˢ = (680 N) / (833 N) ≈ 0.82
After it starts moving, a force of 540 N is required to keep the clock going at a constant speed, so the kinetic friction is also f ᵏ = 540 N. Then
f ᵏ = µ ᵏ n
and solving for the coefficient of kinetic friction yields
µ ᵏ = (540 N) / (833 N) ≈ 0.65
How much work must the rocket motor do to transfer the satellite from the circular orbit to the elliptical orbit?
Answers
To transfer a satellite from a circular orbit to an elliptical orbit, the rocket motor must do work equal to the change in the satellite's potential energy. This is because the potential energy of the satellite is directly related to its distance from the center of the planet.
As the satellite moves from a circular orbit to an elliptical orbit, its distance from the center of the planet changes, which results in a change in its potential energy.
The amount of work required to change the potential energy of the satellite can be calculated using the following formula: Work = ∆PE = GMm(1/a - 1/b), where G is the gravitational constant, M is the mass of the planet, m is the mass of the satellite, a is the initial radius of the circular orbit, and b is the maximum radius of the elliptical orbit.
Therefore, the rocket motor must do work equal to GMm(1/a - 1/b) to transfer the satellite from the circular orbit to the elliptical orbit.
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Because fluid pressure increases witj depth, there is more fluid pressure_____ of a submerged object than on the ____
Answers
Answer:
Because fluid pressure increases with depth, there is more fluid pressure___outside__ of a submerged object than on the _inside___
Explanation:
As the object is submerged means that it is under water and not on the surface. It tells that water pressure exerting on the object from the outside is higher than inside which is why the object is submerged.
In the other case, the object will not remain submerged if its internal pressure is high, it will float on water.
what is the affect of applying an unbalanced force on an object?
Answers
Answer:
An unbalanced force can change an object's motion. An unbalanced force acting on a still object could make the object start moving. An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving
Explanation:
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Description on Slider Mechanism concept on a wheelchair. (200
words)
Answers
A slider mechanism is a concept used in wheelchairs to allow for smooth and efficient movement of the seat. It involves a sliding mechanism that enables the user to adjust the position of the seat along the wheelchair frame, providing flexibility and comfort.
The slider mechanism concept in wheelchairs revolves around the idea of a sliding seat that can be adjusted forward or backward along the frame of the wheelchair. This mechanism allows the user to modify their seating position to achieve optimal comfort, balance, and posture.
Typically, the slider mechanism consists of a set of rails or tracks installed on the wheelchair frame, with the seat attached to a carriage that slides along these tracks. The sliding mechanism can be manual, where the user manually pushes or pulls the seat to adjust its position, or it can be powered, using electric motors or hydraulics for easier adjustment.
The benefits of the slider mechanism are numerous. It allows wheelchair users to modify their seating position to accommodate specific activities or preferences, such as reaching a table or desk, transferring in and out of the wheelchair, or adjusting weight distribution for better balance. The sliding mechanism also helps in preventing pressure sores and discomfort by allowing users to periodically change their seating position and relieve pressure points.
Overall, the slider mechanism concept on a wheelchair enhances the user's mobility and comfort by providing an adjustable seating position. It offers flexibility, adaptability, and improved ergonomics, enabling wheelchair users to customize their experience based on their individual needs and preferences.
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Electric Field Hockey
In this activity, you will again explore the relationship between an electric field and charged particles in the field, but this time you’ll have a gaming challenge. To begin, open Electric Field Hockey.
Directions:
On the control bar, make sure that the Puck is Positive and the Field boxes are checked. Also, make sure that the Practice option is selected.
Your aim is to score goals by manipulating the black puck (test charge) into the blue-colored bracket (goal) on the right. Think smart and place positive source charges (red) and negative source charges (blue) in such a way that the black puck moves into the goal.
Note that when you place a red, positive source charge in the hockey field, a red arrow appears on the black puck (test charge) showing the force the positive charge exerts on the puck. Similarly, when you place a blue, negative source charge in the hockey field, a blue arrow appears on the black puck (test charge) showing the force the negative charge exerts on the puck.
Question 1
Part A
Place a red charge on the hockey field and click Play. In which direction do electric field lines point? In which direction does the black puck move? What conclusion do you draw from this movement?
Part B
Click Reset and then click Clear. Now, place a blue charge in the hockey field and click Play. In which direction do electric field lines point? In which direction does the black puck move? What conclusion do you draw from this movement?
Part C
Manipulate the mass of the puck by dragging the mass bar to the right to increase the mass and to the left to decrease it. What changes do you see in the speed of the puck? Which principle works behind this change?
Part D
In the same situation, what do you observe about the relationship between the speed of the black puck and its distance from the blue charge?
Question 2
You can make the puck travel in complex ways by placing a set of charges around on the field. So, here’s your game challenge: Arrange sources charge around to propel the puck from its starting position into the goal. That’s pretty easy for a straight shot; you just put a negative charge behind the goal. But what if there are barriers along the way? This is a real test of your physical understanding, including Newton’s laws of motion and electrostatic forces. Game’s on!
Part A
On the control bar, check the Trace and Field boxes. The game has three Difficulty levels. Start with Difficulty level one and arrange source charges to get the puck into the goal. Once you’ve made a score at any level, increase the Difficulty level. Take a screen capture of two of your most difficult goals and paste them here. At least one of these should be at Difficulty level 2 or 3.
Please Answer Questions with complete sentences.
Answers
Answer:
The positive charges point away from each other
Explanation:
Why?
Arrows point away from the positive charge and toward the
negative charge.
Explanation:
Suppose that you rubbed a balloon with a sample of animal fur such as a wool sweater or even your own hair. The balloon would likely become charged and its charge would exert a strange influence upon other objects in its vicinity. If some small bits of paper were placed upon a table and the balloon were brought near and held above the paper bits, then the presence of the charged balloon might create a sufficient attraction for the paper bits to raise them off the table. This influence - known as an electric force - occurs even when the charged balloon is held some distance away from the paper bits. The electric force is a non-contact force. Any charged object can exert this force upon other objects - both charged and uncharged objects. One goal of this unit of The Physics Classroom is to understand the nature of the electric force. In this part of Lesson 1, two simple and fundamental statements will be made and explained about the nature of the electric force.
Perhaps you have heard it said so many times that it sounds like a cliché.
Opposites attract. And likes repel.
These two fundamental principles of charge interactions will be used throughout the unit to explain the vast array of static electricity phenomena. As mentioned in the previous section of Lesson 1, there are two types of electrically charged objects - those that contain more protons than electrons and are said to be positively charged and those that contain less protons than electrons and are said to be negatively charged. These two types of electrical charges - positive and negative - are said to be opposite types of charge. And consistent with our fundamental principle of charge interaction, a positively charged object will attract a negatively charged object. Oppositely charged objects will exert an attractive influence upon each other. In contrast to the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. That is, a positively charged object will exert a repulsive force upon a second positively charged object. This repulsive force will push the two objects apart. Similarly, a negatively charged object will exert a repulsive force upon a second negatively charged object. Objects with like charge repel each other.
The activity where to explore the relationships between the electricity field charged with particles and those of the hockey field
The positively change will attract to each other and will opposite to the negatively changed ones. Arrows point away from the positive charge and toward the negative charge.Learn more about the you will again explore the relationship.
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a tank, shaped like a cone has height 12 meters and base radius 1 meter long. it is placed so that the circular part is upward. it is full of water, and we have to pump it all out by a pipe that is always leveled at the surface of the water. assume that a cubic meter of water weighs , i.e. the density of water is ? . how much work does it require to pump all water out of the tank? enter the exact value of your answer.
Answers
It requires 48000π kg*m of work to pump all the water out of the tank. To find the work required to pump all the water out of the tank, first find the volume:
1. Determine the volume of the cone-shaped tank using the formula V = (1/3)πr²h, where V is the volume, r is the base radius, and h is the height. In this case, r = 1 meter and h = 12 meters. V = (1/3)π(1)²(12) = 4π cubic meters
2. Calculate the total weight of the water in the tank using the density of water, which is 1000 kg/m³. Weight = volume × density = 4π × 1000 kg = 4000π kg
3. Determine the distance each infinitesimally small slice of water needs to be pumped. Since the water is pumped out from the top, we can consider the distance to be the height of the tank (12 meters).
4. Calculate the work done to pump out all the water using the formula W = weight × distance. W = 4000π kg × 12 meters = 48000π kg*m
So, it requires 48000π kg*m of work to pump all the water out of the tank.
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The reservoir stores 6 500 000 m3 of water. The density of the water is 998 kg/m3. Calculate the mass of water in the reservoir. Give your answer in standard form.
Answers
Answer:
Mass = 64,870,000,000 kilograms
Explanation:
Given the following data;
Density = 998 kg/m³
Volume = 6,500,000 m³
To find the mass of water in the reservoir;
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the equation;
Density = mass/volume
Making mass the subject of formula, we have;
Mass = density * volume
Mass = 998 * 6,500,000
Mass = 64,870,000,000 kilograms
HELP ME ANSWER THIS FOR 96 POINTS PLEASE!!
The three modified Atwood's machines shown below have blocks of mass M on a frictionless surface
and hanging from a string. When the blocks are released, they accelerate.
Rank them from smallest to largest and explain why in a short paragraph using the mass terms and force.
Answers
Answer:
Smallest - B
Largest - C
Middle - A
The hanging mass provides the force for accelerating the system.
In case A the force M G accelerates 2 * M
So you have for F = M a M * g = 2 * M * a or a = g / 2
In case B F = M a M * g = 3 * M * a and a = g / 3
In case C F = 2 * M * g 2 M * g = 3 * M * a and a = 2 * g / 3
Rank from smallest to largest force Smallest - B, Middle - A, Largest - C.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Smallest - B
Largest - C
Middle - A
The hanging mass provides the force for accelerating the system.
In case A the force M G accelerates 2 * M
So you have for F = M a M * g = 2 * M * a or a = g / 2
In case B F = M a M * g = 3 * M * a and a = g / 3
In case C F = 2 * M * g 2 M * g = 3 * M * a and a = 2 * g / 3
Rank from smallest to largest force Smallest - B, Middle - A, Largest - C.
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what is the resistance of an object that produces a current of a 6 A and has a voltage of 30
Answers
Answer:
this is the answer the required questions
hope you like this
A child throws a baseball straight up into the air and it takes 4.5 seconds to reach maximum height. What is the total time of flight for the baseball after being thrown and the baseball player catching it? What are the known and unknown variables? And what equation must be used?
Answers
Answer:
9 s.
Explanation:
The following data were obtained from the question:
Time (t) taken to reach the maximum height = 4.5 s
Time of flight (T) =?
The time of flight (T) is simply defined as the total time spent by the ball in the air. Mathematically, it defined as twice the time taken (t) to reach the maximum height i.e
T = 2t
With the above formula, we can obtain the time of flight as follow:
Time (t) taken to reach the maximum height = 4.5 s
Time of flight (T) =?
T = 2t
T = 2 × 4.5
T = 9 s
Thus, the time of flight of the ball is 9 s.
Complete the following sentence: The various colors of visible light differ in___ (a) frequency only.
(b) wavelength only.
(c) their speeds in a vacuum.
(d) frequency and wavelength.
Answers
Only the wavelength distinguishes the many colors of visible light. The distance between two consecutive wave crests or troughs is known as the wavelength.
The wavelength is what?The length of a waveform signal that is propagating in space or over a wire is measured by the separation between identical points (adjacent crests) in the adjacent cycles. This length is typically specified in meters (m), centimeters (cm), or millimeters (mm) in wireless systems (mm).
The definitions of wavelength and frequency?The wavelength, which is also the distance between two wave crests and troughs, is the measurement of wave length. In cycles per second (Hz), the term "frequency" refers to the number of vibrations that cross a specific area in a second (Hertz).
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What happens when you sit in a
chair?
A. Gravity is pulling you down but the chair
pushes you up with equal force.
B. Gravity is pulling you down and the chair
pushes you up into the air.
C. There is no force being exerted.
D. Gravity is pulling you down and the chair is
sliding sideways.
Answers
Explanation
Answer:
B
Explanation:
that is the only way you can sit
Please helpp !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
lighting is blank A.a build-up of neutrons B.harmless if you don't hear thunder C.a large discharge of static electricity D.a low-voltage current
Answers
Answer:
C
Explanation:
lightning is an electrostatic discharge
3. explain why very small cloud droplets of pure water evaporate even when the relative humidity is 100 percent.
Answers
Except in cases where the air is supersaturated (the relative humidity is greater than 100%), smaller cloud droplets will evaporate fast.
Air that is saturated with regard to a flat surface is unsaturated with respect to a curved cloud droplet due to the curvature effect.
Even if embryonic droplets of pure water as large as 0.01 micrometers in radius formed by the chance collisions of water molecules, they would be well below the critical radius necessary for survival in air that is just a few percent supersaturated because the supersaturations that develop in natural clouds due to the adiabatic ascent of air rarely exceed a few percent.
According to the theory's premise, salt particles and other hygroscopic aerosols that become deliquescent (i.e., absorb water vapor and dissolve into aqueous solution droplets) under subsaturation are what create cloud droplets. For instance, sodium chloride particles deliquescence point is 75% RH.
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When the velocity of an object Changes it is acted upon by a
Answers
When the velocity of an object changes, it is acted upon by a force
The three agents of sediment ______, which result in deposition as energy decreases, are ice, wind, and water.
Answers
Answer:
The three agents of sediment transport, which result in deposition as energy decreases, are ice, wind, and water.
An object starts at 16 m/s with an acceleration of 4.5 m/s? How far does it go in 9.0 seconds?
Answers
I need answers to these physics problems. (See picture). Also, i'm not sure if the one's I circled are correct
Answers
The length of the vector is proportional to the size of the force.
The wheelchair is not accelerating, so the forces on it are balanced.
In a free-body diagram of the wheelchair, force due to gravity points down, normal force points up, force pushing the wheelchair points forward, friction resisting the motion points backward.
For the force diagram:
In picture 1: F gravity points down; F normal points upIn picture 2: F gravity points down; F tension points upIn picture 3: F gravity points down; F spring points up.What are forces?Forces are a push or pull agents that causes a change in the state of a body when they are applied to the body.
Unbalanced forces cause acceleration of a body.
In a free-body diagram, the mass (force) on an object is represented by a vector.
The length of the vector is proportional to the size of the force. Suppose you push a wheelchair forward at constant velocity. The wheelchair is not accelerating, so the forces on it are balanced. In a free-body diagram of the wheelchair, the vector for the force due to gravity points down, the vector for the normal force points up, the vector for your force pushing the wheelchair points forward, and the vector for the force of friction resisting the motion points backward.
Considering the picture visual representation of the forces between many interacting objects or the force diagram:
In picture 1: F gravity points down; F normal points up
In picture 2: F gravity points down; F tension points up
In picture 3: F gravity points down; F spring points up.
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a 0.300 kg yo-yo hangs at the end of a 0.25 m long string. the yo-yo and string are whirled around such that they are rotating in a vertical plane. the velocity of the yo-yo at the top of the path is 4.00 m/s. what is the tension in the string at that top of the path?
Answers
G = 9.8 m/s2 is the gravitational acceleration. Yo-weight yo's is m = 0.3 kg. The string's length is L = 0.25 meters. Yo-top-of-the-path yo's velocity is equal to 4 m/s. At the top of the walkway, there is tension in the string.
In simple terms, what is gravitational force?
Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive. d
What is gravity, and what does it look like?
The term gravitational force refers to the force that the earth exerts on a body. A ball that is tossed up goes up in the air, as do the leaves and fruits that fall from a tree downward towards the ground.
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1.The Sun is Earth star
Describe this star and compare it to other star
Answers
The star at the center of the Solar System is the Sun. It is a nearly perfect ball of hot plasma that has been heated by nuclear fusion reactions in its center to incandescence, with the energy it emits primarily manifesting as light, ultraviolet, and infrared radiation.
The Sun is Earth star. Describe this star and compare it to other stars.
The Sun, a 4.5 billion year old yellow dwarf star and the center of our solar system, is a hot, burning ball of hydrogen and helium. It is the only star in our solar system and is located approximately 93 million miles (150 million kilometers) from Earth. On our home planet, life as we know it would not be possible without the energy of the Sun.
There are stars that are smaller, larger, and even up to 100 times larger than our Sun, which is an average-sized star. While our solar system only contains one sun, many other solar systems have many suns. The surface of our Sun is 10,000 degrees Fahrenheit and has a diameter of 864,000 kilometers.
In binary or other multiple star systems, where two or more stars orbit one another in a single "system," more than half of all stars are found. In addition, planets surrounding stars other than the Sun have recently been found.
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Explain how mass and velocity play a big role in the amount of momentum an object has.
Answers
Answer:
Momentum is directly proportional to the object's mass and also its velocity. Thus the greater an object's mass or the greater its velocity, the greater its momentum. Momentum p is a vector having the same direction as the velocity v. The SI unit for momentum is kg · m/s.
Answer:
Momentum is directly proportional to the object's mass and also its velocity. Thus the greater an object's mass or the greater its velocity, the greater its momentum. Momentum p is a vector having the same direction as the velocity v. The SI unit for momentum is kg · m/s.
Explanation:
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As a geologist, you come across a landscape with a massive fault zone that
produces a lot of large earthquakes but has no volcanoes. What type of plate
boundary is this? What are the movements of plates there? Where is this type
of boundary found in California?
Answers
Answer:
At a convergent boundary where both plates are continental, mountain ranges grow and earthquakes are common. At a transform boundary, there is a transform fault and massive earthquakes occur but there are no volcanoes. Processes acting over long periods of time create Earth's geographic features.
Explanation:
A pulley system is used to lift an object. Which factor could affect the efficiency of the system? (1 point)
O the mass of the person pulling
O the distance the weight is lifted
O the friction of the individual pulleys
O the mass of the object
Answers
Answer:
the distance the weight is lifted
Explanation:
Derive a relation for the length of a rod at a given tempreture t 0c when l0 is its length at 0 0c
Answers
The relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT)
When a rod is heated from 0°c to a temperature t°c, its length increases which is given by the following formula
ΔL/L0 = αΔT
Where ΔL = change in length = L- L0
Thus,
L-L0/L0 = αΔT
⇒ L-L-L0 = L0(αΔT)
⇒ L = L0 + L0(αΔT)
Or L = L0(1 + αΔT)
Here L is the length at temperature t°c
L0 is the length at 0°c
α = coefficient of thermal expansion
ΔT = change in temperature
Thus, the relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT).
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If the object's initial velocity is 0 m/s , what is the velocity of an object at t = 8.0s
Answers
Answer:
0_8.0
8.0m/s
Explanation:
8.0m/s is the velocity of an object .
EASY BUT PLEASE HELP
Compare and contrast infrared waves, light waves, and ultraviolent waves
Answers
Answer:
Infrared waves have a wavelength 1,000x longer than ultraviolet waves (10^-16 vs 10^-13). ... The amplitude (or height) of an electromagnetic wave is proportional to its intensity
Explanation: