a 95-kg man pushes a crate 4.5 m up along a ramp that makes an angle of 17° with the horizontal. he exerts a force of 520 n on the crate parallel to the ramp and moves it at a constant speed. calculate the work done by man ?

The work done in pulling the crate 1000 m at constant velocity is 300000 Joules.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.

The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.

As given in the problem a 6000 N crate is pulled across an icy surface. the coefficient of kinetic friction is 0.05.

The frictional force responsible for the work don

Frictional force = μMg

                         =0.05× 6000

                         = 300 N

Work done = force  × displacement

                  = 300 ×1000

                  = 300000 Joules

Thus, the work done in pulling the crate 1000 m at constant velocity would be 300000 Joules.

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A battery is connected to two capacitors shown below. the capacitors have air between the plates. The total charge coming out of the power supply: 8.16 × 10⁻⁹ C.

Capacitor 1 has a plate area of 1.5 cm² and an electric field between its plates of 2000 V/m and Capacitor 2 has a plate area of 0.7 cm² and an electric field of 1500 V/m.

Therefore, the total charge coming out of the power supply can be calculated by using the following formula:

Q = C × V,

where Q is the total charge coming out of the power supply.

C is the capacitance of the capacitors.

V is the voltage of the capacitors.

The capacitance of a parallel plate capacitor can be calculated by using the following formula:

C = εA/d,

where C is the capacitance of the capacitor.

ε is the permittivity of air.

A is the area of the capacitor plates.

d is the distance between the plates of the capacitor.

let's calculate the capacitance of the capacitors:

For capacitor 1:

ε = ε₀ = 8.85 × 10⁻¹² F/m²

A = 1.5 cm² = 1.5 × 10⁻⁴ m²d = ?

E = 2000 V/mQ = CV

C = εA/dC₁ = ε₀A/d

C₁ = ε₀A/E₁

C₁ = ε₀A/(V/d)

C₁ = (ε₀A/d) × V⁻¹

C₁ = ε₀A₁/E₁

C₁ = (8.85 × 10⁻¹² F/m²)(1.5 × 10⁻⁴ m²)/(2000 V/m)

C₁ = 6.63 × 10⁻¹⁰ F

For capacitor 2:

ε = ε₀ = 8.85 × 10⁻¹² F/m²

A = 0.7 cm² = 0.7 × 10⁻⁴ m²

d = E = 1500 V/m

Q = CV

C = εA/d

C₂ = ε₀A/d

C₂ = ε₀A/E₂

C₂ = (8.85 × 10⁻¹² F/m²)(0.7 × 10⁻⁴ m²)/(1500 V/m)

C₂ = 3.95 × 10⁻¹¹ F

Total charge coming out of the power supply: Q = C₁V + C₂VQ = (6.63 × 10⁻¹⁰ F)(12 V) + (3.95 × 10⁻¹¹ F)(12 V)Q = 8.16 × 10⁻⁹ C. Therefore, the total charge coming out of the power supply is 8.16 × 10⁻⁹ C.

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It is possible to determine an object's volume by making it forcibly sink. The item is attached to another easily sinkable object for this purpose.

The volume of the floating item may be calculated since it will sink in the water.

Weighing down a floating item with a heavy object is one way to calculate its volume. It's crucial to gauge the water's depth with the heavy object submerged first, and then with the heavy object pulling the floating object down into the water.

When the weight force on an object is countered by the water's upward push, the thing floats. The amount of the object submerged increases the water's upward push, which is unaffected by the water's depth.

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If I were a scientist and I would have wanted to invent and achieve. I would  have wanted to invent a vaccine for cancer disease.

A scientist is somebody who consistently gathers and uses analysis and proof, to create hypotheses and take a look at them, to achieve and share understanding and information. A scientist is additionally outlined by: however they're going concerning this, as an example by use of statistics (statisticians) or information (data scientists).

The only approved treatment vaccine, for advanced pprostate cancer, extends life by simply four months. Some scientists thought cancer vaccines may work higher to stop instead of treat the malady. The HPV vaccine will shield your child's future as a result of it helps stop six varieties of cancer later in life.

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The vectors point along the axis of rotation with a direction determined by an arrow.

There are two types of physical quantity one is a scaler and another one is a vector.

The quantity that requires only megnitude to define is known as the scalar quantity. While the vector quantities need both megnitude and the direction to define.

The vector quantity is represented by an arrow. The vectors point along the axis of rotation with a direction determined by an arrow.

The angular quantities L, omega, and alpha are vector quantities.

Hence arrow is the correct answer for the blank.

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The direction of the vectors of angular momentum and L, angular velocity omega and the mass alpha is determined using the right hand rule.

Righthand rule in physics states that, when we curl our right hand fingers, the direction of the angular momentum and velocity will be in the direction of thumb and curl of fingers determine the axis of rotation.

Angular momentum is a vector quantity defined as the product of moment of inertia and angular velocity where, the angular velocity ω is the rotational analogue of linear velocity i.e.. product of the linear velocity and radius of rotational path.

Therefore, the angular quantities L, angular velocity ω along the axis of rotation can be determined using the right hand rule. Where direction of thump represents the direction of vector components.

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The formula to calculate speed is distance/time and the speed for the approach is 6m/s.

This refers to the rate of movement of an object in relation to time.

Hence, we can see that given a sample data:

Hence, to find the speed for the sample data:

Distance/Time

36/6

= 6m/s

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When two astronauts, initially at rest and facing each other in space, push on each other, they will both move away from each other due to Newton's third law of motion and the conservation of momentum.

The given phenomenon can be explained using Newton's third law of motion and the conservation of momentum.

Apply Newton's third law of motion.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. When the astronauts push on each other in space, the force applied by each astronaut on the other is equal in magnitude but opposite in direction.

Apply the conservation of momentum.
In this scenario, the total momentum of the astronauts before they push off each other is zero, as they are initially at rest. After they push off, the total momentum of the system must still be zero to conserve momentum.

Observe the resulting motion.
Due to the conservation of momentum, the astronauts will move away from each other with equal and opposite velocities. This means that their relative speeds and distances traveled will be the same but in opposite directions.

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Answer:summer

Explanation:

Answer:

first day of summer

Explanation:

Explanation:

formula: Mass

Density x volume

2a) m=10kg v=0.3m³

10÷0.3=33.3 kg/m

2b) m = 160 kg V=0.1m³

160÷0.1=1600 kg/m

2c) m = 220 kg V = 0.02m³

220÷0.02=11000 kg/m

A wooden post has a volume of 0.025m³ and a mass of 20kg. Calculate its density in kg/m.

density = volume ÷ mass

20÷ 0.025=800 kg/m

Challenge: A rectangular concrete slab is 0.80m long, 0.60 m wide and 0.04m thick. Calculate its volume in m³.

Formula : Length x width x height = Volume

0.80 x 0.60 x 0.04 = 0.0192m³

B) The mass of the concrete slab is 180 kg. Calculate its density in kg/m.

density = volume ÷ mass

180 ÷ 0.0192 = 9375 kg/m

The birdman needs to soar 86.43m in the air to hit the bucket.

The ball's diameter, d, and the amount of time, t, it takes to cross the photogate can both be used to calculate the beginning horizontal velocity. Vo = d/t, then.

Time of motion of the birdman

The duration of the birdman's motion is the amount of time it takes for him to soar to his highest point.

R = Vₓt

where;

R is the birdman's motion's range or his horizontal distance.

Time of motion is t.

The horizontal speed is Vx.

t = R/Vₓ

t = 147/ 35

t = 4.2 seconds

Maximum height the missile has climbed

h = ¹/₂gt²

where;

The birdman's height is measured in h.

Gravitational acceleration, or g,

h = ¹/₂(9.8)(4.2)²

h = 86.43 m

The birdman must therefore fly to a height of 86.43m in order to hit the bucket.

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Answer: 20.4 m

Explanation: \(\frac{9.8^{2} }{Velocity} = Max Height\)

The answers to this test are:

1.  What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?  

24.2 m/s

2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?

20.4 m

3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?

22.5 m/s

4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?

109,375 J

5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?

It is easy to calculate new scenarios.

Marginalized individuals, including people with disabilities and those who identify as LGBTQ+, can experience significant impacts due to trauma, discrimination, negative attitudes, and exclusion. These factors contribute to physical and psychological harm, hinder access to opportunities and resources, and perpetuate systemic inequalities.

Marginalized individuals, such as people with disabilities, face unique challenges that can exacerbate the impact of trauma, discrimination, negative attitudes, and exclusion. Trauma experienced by individuals with disabilities may result from direct incidents or from the effects of living in a society that is not fully inclusive. Discrimination and negative attitudes towards people with disabilities can lead to social isolation, limited employment prospects, and reduced access to healthcare and education. This exclusion can have long-lasting effects on their mental health, self-esteem, and overall well-being. Similarly, individuals who identify as LGBTQ+ may also face trauma, discrimination, negative attitudes, and exclusion. LGBTQ+ individuals often encounter higher rates of bullying, harassment, and violence due to their sexual orientation or gender identity. These experiences can lead to psychological distress, anxiety, depression, and even post-traumatic stress disorder (PTSD). Discrimination and exclusion from healthcare, housing, employment, and social support systems further compound the challenges faced by LGBTQ+ individuals, hindering their ability to thrive and fulfill their potential.

In both cases, the impacts of trauma, discrimination, negative attitudes, and exclusion are far-reaching. They can contribute to a cycle of disadvantage, limiting opportunities for personal growth, social participation, and economic advancement. Recognizing and addressing these issues is essential for fostering a more inclusive society that supports the needs and rights of marginalized groups, empowering individuals to overcome the barriers they face and promoting their overall well-being.

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Her initial acceleration must rise as a result of a decrease in moment of inertia in order to maintain the same angular momentum. What happening to the wrestler's kinetic energy during this phase. Increased kinetic energy.

Describe kinetic energy. An item accumulates kinetic energy when work, which involves the transferring of energy, be done on it by exerting a net force.

The relationship between kinetic energy and an object's mass and unit of its velocity is direct: K.E. = 0.5 m v2. The kinetic energy is measured in kilograms-meters squared per real - time data if the mass is measured in kilograms and the velocity is measured in meters per second.

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Answer:

Tuning a piano is the process of adjusting the tension of its strings, thereby altering their pitch, or frequency of vibration, by slightly turning the tuning pins to which they're attached, so that each string sounds pleasingly in harmony with every other string.

Answer: The pressure decreases as the temperature decreases.

Explanation: As the temperature decreases, the particles of gas start moving more slowly. The particles' velocity decreases and as it collides with the wall of the container, it exerts a less force on the walls of the container. This follows on from the equation Ft = mv - mu. Less force therefore means less pressure as force and pressure are proportional according to equation Pressure = Force / Area.

"a) The chicken scratching the ground does zero work.

b) A person studying is still and has no displacement so the work done is zero.

c) A crane lifting the bucket does positive work.

d) The force of gravity on the bucket does negative work.

e) The leg muscles of a person in the act of sitting down does negative work."

Mathematically, work done can be written as,

W = F r cosθ

where,

θ is the angle between force and displacement

r is displacement

a) The displacement is zero because the chicken is still, which suggests that the work is also zero.

b) As the person is still there is no displacement and the work done is zero.

c) The crane applies a vertical force and the displacement is vertical, therefore the work is positive.

d) The force of gravity is directed downwards and the displacement is upwards, so the angle between it is 180º and the 180º fly is -1. Consequently, the work is negative

e) When the person meticulously feels the upward force and the displacement is downward, the work is negative.

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Answer:

A.) The particles that make up material A have more mass than the

particles that make up material B.

HOPE that helps!!! :)

The total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

V = d / t

V = ( u + v ) / 2

V = Average Speed

d = Distance

t = Time

u = Initial velocity

v = Final velocity

During the first 0.5 s, u = 0 and v = 1 m / s.

d = ( 0 + 1 ) * 0.5 / 2

d = 0.25 m

During the next 0.5 s, u and v are equal meaning constant velocity ( V = 1 m / s ).

d = 1 * 0.5

d = 0.5 m

During the next 1 s, u = 1 m / s and v = 1.5 m / s.

d = ( 1 + 1.5 ) * 1 / 2

d = 1.25 m

During the next 2.5 s, u and v are equal meaning constant velocity ( V = 1.5 m / s ).

d = 1.5 * 2.5

d = 3.75 m

During the next 0.5 s, u = 1.5 m / s and v = 0.

d = ( 1.5 + 0 ) * 0.5 / 2

d = 0.375 m

Total distance travelled is the sum of all the individual distances calculated.

Total distance travelled = 0.25 + 0.5 + 1.25 + 3.75 + 0.375

Total distance travelled = 6.125 m

Therefore, the total distance travelled during the vehicle's journey as found from the speed-time graph is 6.125 m

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Answer:20 miles

Explanation:

Answer:

The momentum of the car is 35,000 kg.m/s

Explanation:

Momentum

Momentum is often defined as mass in motion.

Since all objects have mass, if it's moving, then it has momentum. It can be calculated as the product of the mass by the velocity of the object:

\(\vec p = m\vec v\)

If only magnitudes are considered:

p = mv

The car has a mass of m=1,000 kg and travels at v=35 m/s. Calculating its momentum:

p = 1,000 kg * 35 m/s

p = 35,000 kg.m/s

The momentum of the car is 35,000 kg.m/s

The momentum of the car is 35000 kgm/s.

Linear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.

If m is the mass and v is the velocity of an object, then the object's momentum p is given below.

\(p = mv\)

Given that the mass of the car is m=1,000 kg and travels at v=35 m/s. The momentum is given below.

\(p = 1000 \times 35\)

\(p = 35000 \;\rm kg m/s\)

Hence we can conclude that the momentum of the car is 35000 kgm/s.

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The strength of the magnetic field at the centrer of coil is calculated to be 1.97× 10⁻⁷ Tesla

A magnetic field is a vector field that explains the magnetic impact on moving charges, currents, and magnetic materials. A moving charge in a magnetic field is subjected to a force that is perpendicular to both its own velocity and the magnetic field.

We know that for a circular wire the magnetic field at the center is given by

B= μI/2r

Here, μ= 4π×10⁻⁷

I= current flowing= 0.15A

r= radius of the circular wire

In the given question the wire of length 3m is bent into a circular coil of one turn.

So, the circumference of coil will be equal to the length of the coil.

Length= circumference= 2πr

2πr= 3m        (π≅3.14)

r=  \(\frac{3}{2* 3.14}\)= 0.477 m

Now putting the value of r= 0.477 m in magnetic field formula we get

B= \(\frac{4\pi }{2* 0.477}\)×10⁻⁷

B= 1.97× 10⁻⁷ Tesla

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The value of gravitational torque after solving the expression will be equal to -0.18375 N.mz.

The rotating equivalent of a force in physics or mechanics is called torque. Depending on the topic matter, it may also be referred to as the moment, point in time of force, rotating force, or turning effect. It symbolizes a force's capacity to cause a change inside the bodies natural rotational motion.

As per the given information in the question,

Mass, m = 50 g

Length, l = 75 cm

Gravitational force, \(\vec F\) = -mgy

Then, the position vector of the particle will be,

\(\vec \tau\) = l(cos 60° x + sin 60° y) × (-mgz)

= -0.18375 N.mz

Therefore,

\(\tau_x, \tau_y,\tau_z=0, 0, -0.18375\)

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Answer:

Specific heat capacity, = 1.43 J/g°C

Explanation:

Given the following data;

Mass = 10 g

Change in temperature = 140°C

Quantity of heat = 2000 J

To find the specific heat capacity;

Heat capacity is given by the formula;

\( Q = mcdt\)

Where;

Making c the subject of formula, we have;

\( c = \frac {Q}{mdt} \)

Substituting into the equation, we have;

\( c = \frac {2000}{10*140} \)

\( c = \frac {2000}{1400} \)

Specific heat capacity, = 1.43 J/g°C

Answer:

-5 m/s^2

Explanation:

10/2=5 and is is a stop so it is negitive

Answer:

Scientists use many skills as they investigate the world around them. They make observations by gathering information with

their senses. Some observations are simple. For example, a simple observation would be figuring out the color or texture of

an object. However, if scientists want to know more about a substance, they may need to take measurements.

Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be

difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the

chemical industry, it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous

other occupations and activities.

The word “measurement” comes from the Greek word “metron,” which means “limited proportion.” Measurement is a

technique in which properties of an object are determined by comparing them to a standard.

Measurements require tools and provide scientists with a quantity. A quantity describes how much of something there is or

how many there are. A good example of measurement is using a ruler to find the length of an object. The object is

whatever you are measuring, the property you are trying to determine is the object’s length, and the standard you are

comparing the object’s length to is the ruler.

In general, scientists use a system of measurement still commonly referred to as the “metric system.” The metric system

was developed in France in the 1790s and was the first standardized system of measurement. Before that time, people

used a variety of measurement systems.

In 1960, the metric system was revised, simplified, and renamed the Système International d’Unites (International

System of Units) or SI system (meters, kilograms, etc.). This system is the standard form of measurement in almost

every country around the world, except for the United States, which uses the U.S. customary units system (inches,

quarts, etc.). The SI system is, however, the standard system used by scientists worldwide, including those in the

United States.

There are several properties of matter that scientists need to measure, but the most common properties are length and mass.

Length is a measure of how long an object is, and mass is a measure of how much matter is in an object. Mass and length

are classified as base units, meaning that they are independent of all other units. In the SI system, each unit of measure has

a base unit.

Explanation:

Some things scientists want to measure may be very large or very small. The SI, or metric, system is based on the

principle that all quantities of a measured property have the same units, allowing scientists to easily convert large and

small numbers. To work with such large or small numbers, scientists use metric prefixes. Prefixes can be added to base

units and make the value of the unit larger or smaller. For example, all masses are measured in grams, but adding

prefixes, such as milli- or kilo-, alters the amount. Measuring a human’s mass in grams would not make much sense

because the measurement would be such a large number. Instead, scientists use kilograms because it is easier to write

and say that a human has a mass of 90 kilograms than a mass of 90,000 grams. Likewise, one kilometer is 1,000 meters,

while one millimeter is 0.001 meters. The table below lists some common prefixes and the quantities they represent.