As a projectile moves along its trajectory, check all of the following that are true statements.
Question 8 options:
1) As the projectile moves down, its vertical velocity is positive.
2) As the projectile moves up, its acceleration increases.
3)As the projectile moves down, its acceleration remains constant.
4) As the projectile moves up, its vertical velocity remains constant.
5) As the projectile moves up, its vertical velocity decreases.
6) As the projectile moves down, its vertical velocity increases.
7) As the projectile moves down, its vertical velocity decreases.
8) As the projectile moves up, its acceleration remains constant.
9) As the projectile moves down, its vertical velocity is negative.
10) As the projectile moves down, its vertical velocity remains constant.
11) As the projectile moves up, its vertical velocity is negative.
12) As the projectile moves up, its vertical velocity is positive.
13) As the projectile moves up, its vertical velocity increases.
14) As the projectile moves down, its horizontal velocity remains constant.
15) Acceleration changes as the projectile moves.
16) As the projectile moves down, its acceleration decreases.
17) As the projectile moves up, its horizontal velocity remains constant.
Answers
As the projectile moves down, its vertical velocity is positive.
As the projectile moves down, its acceleration remains constant.
As the projectile moves up, its vertical velocity decreases.
As the projectile moves down, its vertical velocity increases.
As the projectile moves up, its acceleration remains constant.
As the projectile moves up, its vertical velocity is negative.
As the projectile moves down, its horizontal velocity remains constant.
As the projectile moves up, its horizontal velocity remains constant.
What is projectile motion?
A projectile is any object thrown into space upon which the only acting force is gravity. The primary force acting on a projectile is gravity.
In a projectile motion, acceleration is always constant and acts vertically downward. Also velocity changes during a projectile motion.
The true statements about projectile motion in the given options include;
As the projectile moves down, its vertical velocity is positive.As the projectile moves down, its acceleration remains constant.As the projectile moves up, its vertical velocity decreases.As the projectile moves down, its vertical velocity increases.As the projectile moves up, its acceleration remains constant. As the projectile moves up, its vertical velocity is negative.As the projectile moves down, its horizontal velocity remains constant.As the projectile moves up, its horizontal velocity remains constant.Learn more about projectile motion here: https://brainly.com/question/24216590
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Related Questions
Why is the Earth generally warmer at the equator than at the poles?
Answers
Answer: The Sun's energy is more concentrated on the equator than the poles. This is because the Sun's energy (in the form of warmth) is more direct at the equator, and less direct at the poles.
Explanation: You can see this with a flashlight. When you point the flashlight directly toward a tale, the light is very concentrated and right. However, when you point the flashlight toward the table at an angle, the light becomes more spread out and less concentrated. This is why even though sometimes the North Poles and South Poles have 24 hours of sunlight, it never actually reaches a high temperature and instead, keeps it's cold temperature.
which electromagnetic radiation wavelength is efficiently observed using ground based telescopes? a. radio b. infrared c. visible d. X-rays.
Answers
Radio is the electromagnetic radiation wavelength is efficiently observed using ground based telescopes. Option A.
What is meant by electromagnetic radiation?In terms of physics, electromagnetic radiation is made up of electromagnetic field waves that travel over space while carrying radiant electromagnetic energy. It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves. These waves are all a component of the electromagnetic spectrum.
The energy levels of electromagnetic radiation can range from low to high. It consists of x-rays, gamma rays, infrared light, visible light, ultraviolet light, radio waves, and microwaves.
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Decide whether each statement is True or False, and give a reason for each answer. Here V is a nonzero finite-dimensional vector space. a. If dim V p and if S is a linearly dependent subset of V, then S contains more than p vectors. b. If S spans V and if T is a subset of V that contains more vectors than S, then T is linearly dependent.
Answers
The first statement is true; if dim V = p and if S is a linearly dependent subset of V, then S contains more than p vectors.
The second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearlyly dependent.
Explanation:
If S is linearly dependent, then there is at least one vector in S that can be written as a linear combination of the remaining vectors. If this is the case, then this vector is redundant, and it can be removed from S. This means that we can repeat the process until we have removed all the redundant vectors from S.So, let us assume that S is a linearly dependent subset of V such that dim V = p, then we have the following:dim (span S) < dim Vp. So S contains more than p vectors.
The second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearly dependent.
Explanation:Let us assume that S spans V and if T is a subset of V that contains more vectors than S, then T must have a vector not in S. We can add this vector to S to get a set that contains all the vectors in T. The resulting set is linearly dependent because it contains more vectors than S, which is known to span V.
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Please help me to solve this, I don’t really know what to do.
A device requires 5 amps to operate properly.
What total resistance is needed in order to obtain 5 amps when 110 volts is applied across a circuit?
If the device has a resistance of 8 ohms, what additional resistor needs to be added to the circuit and how should the resistor and device be hooked up?
Answers
Explanation:
Use Ohm's Law
V / R = I
I = 5A
V = 110V
R =?
Solve for R
if you need further help let me know
with what force in the rightward direction, fx , should marcel push? if your expression would give a negative result (using actual values) that just means the force should be toward the left.
Answers
The force in the rightward direction, fx , should Marcel push is this force leads to counterclockwise torque. Fx = - (w L2 + w L3 - W Lend) / h.
A force in physics is an effect that changes the velocity, or acceleration, of a mass-moving object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.
Viewing equilibrium of torque:
W Lend + Fx × h = w L2 + wL3
Fx = (w L2 + w L3 - WLend) / h
In the rightward direction, Fx,
Fx = - (w L2 + w L3 - W Lend) / h
Thus, this force leads to counterclockwise torque.
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The given question is incomplete, so the most probable complete question is,
With what force in the rightward direction, fx , should Marcel push? if your expression would give a negative result (using actual values) that just means the force should be toward the left.
The image of the question is attached below.
What is solubility? (8th grade science)
Answers
Explain how this proverb relates to the following circuit, where electric current from the batteryencounters two alternate paths, one being less resistive than the other:
Answers
ANSWER:
The current always choose low resistor to flow in circuit
STEP-BY-STEP EXPLANATION:
Gven:
V = 10 V
R1 = 250 Ω
R2 = 800 Ω
Apply Ohm's law:
\(I=\frac{V}{R}\)We calculate the current in each case:
\(\begin{gathered} I_1=\frac{V}{R_1}=\frac{10}{250}=0.04\text{ A} \\ \\ I_2=\frac{V}{R_1}=\frac{10}{800}=0.0125\text{ A} \\ \\ \text{ Therefore:} \\ \\ I_2That means current always choose low resistor to flow in circuit
Two units of measurement for energy are calories and joules. The measurement of 32. 3 kj is the same amount of energy as ___________.
Answers
The measurement of 32.3 kJ is equivalent to approximately 7,726.94 calories.
Energy can be measured in different units, such as calories and joules. To convert between these units, we need to know the conversion factor.
One joule (J) is equivalent to 0.239005736 calories (cal). Therefore, to convert kilojoules (kJ) to calories, we need to multiply the value in kilojoules by the conversion factor.
In this case, we have 32.3 kJ. To convert it to calories, we multiply 32.3 by the conversion factor:
32.3 kJ * 0.239005736 cal/J ≈ 7,726.94 calories
Hence, the measurement of 32.3 kJ is approximately equivalent to 7,726.94 calories. It's important to note that the conversion factor used here is an approximate value, and the exact conversion factor may vary slightly depending on the specific definitions and standards used for calories and joules.
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A 2603 kg car starts from rest at the top of a driveway of length 5 m that is sloped at 35° with the horizontal. An average frictional force of 3651 N impedes on that motion. Find the speed of the car at the bottom of the driveway. The acceleration of gravity is 9.8m/s^2.
Answers
The speed of the car at the bottom of the driveway is approximately 4.71 m/s.
To find the speed of the car at the bottom, first, calculate the parallel component of gravity (Fg_parallel = m * g * sin(theta)), which is 2603 kg * 9.8 m/s² * sin(35°) ≈ 14724 N.
Then, find the net force acting on the car (F_net = Fg_parallel - frictional force), which is 14724 N - 3651 N = 11073 N. Next, determine the acceleration (a = F_net / m) as 11073 N / 2603 kg ≈ 4.26 m/s².
Finally, use the kinematic equation (v² = u² + 2as) to calculate the final speed (v = √(0² + 2 * 4.26 m/s² * 5 m)) ≈ 4.71 m/s.
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3.
The mass of a regulation tennis ball is 57 g. Typically during a serve the ball is in contact with the tennis racket for 30 ms. If the serve
was measured at 73.14 m/s what impulse was exerted on the tennis ball?
5.5 kg. m/s
7.8 kgm/s
2.3 kg. m/s
4.2 kg. m/s
Answers
B:because
Is visible light a form of
radiation? Explain.
Answers
Answer:
Yes,in fact visible 'light' is a form of radiation, which can be defined as an energy that travels in the form of electromagnetic waves. It can also be described as a flow of particle-like 'wave-packets', called photons, that travel constantly at the speed of light (about 300 000 kilometres per second).
Explanation:
reselasie3. An object of mass 900 kg is hanging from a ceilingby means of two strings. The first string (7₁) makes anangle of 40 degree with the horizontal-right. The second string(T₂) makes an angle of 20 degree with the horizontal-left.Calculate the tension in the first string (7₁) (2 point)A. O12034.001 NB. O14675.062 NC. 5790.32 ND. 09570.261 NE. 13316.872 N
Answers
First, find the weight of the object.
W = m g = 900 x 9.8 = 8,820 N
T2x = -t2 cos 20
t1 x = t1cos 40
mgx= 0
T2y= t2 sin 20
t1y= t1 sin 40
mgy= - mg
X and y components of resultant (R)
Rx = t1x -t2x + mgx
Rx= -t2 cos 20 + t1cos 40 (3)
Ry = t2 sin 20 + t1 sin 40 - mg(2)
Rx, and Ry = 0
0 = -t2 cos 20 + t1cos 40 (3)
0= t2 sin 20 + t1 sin 40 - mg (4)
Solve (3)
0 = -t2 cos 20 + t1cos 40
t2 cos 20 = t1 cos 40
t2 = t1 cos40/cos20
t2 = 0.815 t1
Substitute t2 in 4
0 = t2 sin 20 + t1 sin 40 - mg
0 = (0.815 t1) sin 20 + t1 sin 40 - 8,820
0= t1 ( 0.815 sin 20 + sin 40 ) -8820
0 = 0.921 t1 -8820
8820 = .921 t1
t1 = 8820/0.921
t1= 9570.261N (option D)
If an object of mass 70kg falls from a height of 500 m, what is the maximum velocity of the object?
Answers
Answer:
H = 1/2 * g * t^2 since initial velocity is zero
v = g * t where v is the final velocity
t = v / g
H = 1/2 g * v^2 / g^2 = 1/2 v^2 / g
v = (2 * H * g)^1.2
v = (2 * 500 * 9.8)^1/2 = 99 m/s
Check: t = v / g = 99 / 9.8 = 10.1 sec
H = 1/2 * 9.8 * 10.1^2 = 500 m
Normal human body temperature is 98.6°F. What is this temperature expressed in Celsius (°C) and in Kelvin (K)?
Answers
Answer: 37 Celsius and 310.15 K
Explanation:
C/5 = (F-32)/9 = (98.6-32)/9 = 66.6/9 = 7.4
C = 7.4 * 5 = 37 so the temperature is 37 Celsius
K = C + 273.15 = 37 + 273.15 = 310.15 K
If a car started to move from rest position ,after 6 second its acceleration became 5/m2.What will be final velocity of car
Answers
Answer:
the final velocity of the car after 6 seconds of acceleration is 30 m/s.
Explanation:
The final velocity of the car can be found using the kinematic equation:
v = u + at
where u is the initial velocity (which is zero since the car starts from rest), a is the acceleration (which is 5 m/s^2), t is the time elapsed (which is 6 seconds).
Substituting the given values, we get:
v = 0 + 5 x 6
v = 30 m/swhich property of a wave is labeled "x" on the diagram?
a. amplitude
b. frequency
c. wavelength
d. none of the above
(thank you!)
Answers
How are particles in air arranged in a:
a) compression?
b) rarefaction?
Answers
What are the likely forms of wasted energy from the engine
Answers
In a typical internal combustion engine, such as those found in most automobiles, energy is wasted in a number of ways:
1. Thermal Energy: The majority of the energy from the combustion process is lost as heat through the exhaust. This is because the combustion process is far from perfectly efficient.
2. Mechanical Energy: Some energy is lost through mechanical inefficiencies in the engine itself, such as friction between moving parts.
3. Pumping Losses: Engines lose energy through the work required to pump air and fuel into the cylinders and push out the exhaust gases.
4. Radiated Energy: Some energy is lost through heat radiated from the engine block itself, particularly when the engine is running hot.
5. Idle Losses: When the engine is running but the vehicle is not moving (idling), all of the energy being used by the engine is essentially wasted.
6. Accessory Load: Energy is used to power the various accessories in a vehicle, such as the alternator, power steering pump, air conditioning compressor, etc. While these are necessary for the operation of the vehicle, they do represent a form of energy loss in terms of the overall efficiency of the engine.
7. Incomplete Combustion: Not all of the fuel that enters the engine's combustion chamber is burned. Some is expelled as unburned hydrocarbons, which is not only a waste of energy but also a source of pollution.
8. Transmission Losses: Some energy is lost in the transmission as the power is transferred from the engine to the wheels.
It's important to note that these are inherent to the design of internal combustion engines, and while engineers continually work on improving the efficiency of these engines, these forms of energy loss are difficult to completely eliminate.
Newton’s first law of motion states that an object's motion remains the same unless a force acts upon it. What would be an example of this law in action?
Answers
Answer:
A driver breaks suddenly and the passengers are flung forward
what's 4 x 5
i need help with this question please
Answers
Answer:
4 × 5 = 5 + 5 + 5 + 5 = 20
Explanation:
Pick one factor and add it.
When Jeff ran up a hill at 7.0 m/s, the horizontal component of his velocity vector was 5.1 m/s. What was the vertical component of Jeff's velocity?
Answers
When Jeff ran up a hill at 7.0 m/s, the vertical component of his velocity was 4.8 m/s and the horizontal component of his velocity vector was 5.1 m/s.
What is velocity?The direction of movement of the body or item is defined by velocity. Speed is fundamentally a scalar number. Velocity is, in essence, a vector quantity. It is the pace at which distance changes. It is the displacement rate of change. Speed is the pace at which an item moves along a route in time, whereas velocity is the rate and direction of movement. In other words, velocity is a vector, whereas speed is a scalar number. Simply put, velocity is the rate at which something travels in a certain direction. For example, the speed of a car driving north on a highway or the speed of a rocket after launch.
Here,
the vertical component of Jeff's velocity,
=√7²-5.1²
=4.8 m/s
The vertical component of Jeff's velocity is 4.8 m/s when Jeff ran up a hill at 7.0 m/s, the horizontal component of his velocity vector was 5.1 m/s.
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Gases are unique in comparison to solids and liquids because they
a. obey Bernoulli's principle.
c. are fluids.
b. have no definite shape. d. are easily compressible.
Answers
Answer:
d. are easily compressible.
Explanation:
Solids and liquids are not easily compressible while gas is.
the current in two identical light bulbs connected in series is 0.25 a. the voltage across both bulbs is 110 v. the resistance of a single light bulb is
Answers
The required resistance of a single light bulb is calculated to be 220 ohms per bulb.
Ohm's Law is a formula used to calculate the relationship between voltage, current, and impedance in an electrical circuit.
Ohm's Law (E = IR) is as basic to students of electronics as Einstein's Relativity equation (E = mc²) is to physicists.
where,
E = voltage in volts
I = current in ampere
R = resistance in ohm
110 volts divided by 0.25amps, we get 440 ohms.
440 divided by 2, we get 220 ohms per bulb.
R = 110/(2×0.25) = 220 ohms
Thus, the required resistance of a single light bulb is 220 ohms.
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diagram 1 shows a teenage boy skating along a straight path. His velocity decreases from 5.0ms-1 to 3.0ms-1 as he moves through a distance of 16.0 m. What is his deceleration?, in ms-2?
Answers
suppose a 1200-kg elevator car is lifted a distance 39 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 1575 n. Calculate the work done on the elevator by its cable, in joules
Answers
The work done on the elevator by its cable is 459348 joules. Work is defined as the product of the force acting on an object and the distance moved by the object in the direction of the force.
Therefore, the work done on the elevator by its cable will be calculated using the formula:W = Fdwhere W is the work done, F is the force applied, and d is the distance moved by the object.
The force applied on the elevator by the cable is equal in magnitude to the weight of the elevator, which is given by:F = mgwhere F is the force applied, m is the mass of the elevator, and g is the acceleration due to gravity. Substituting the given values:F = (1200 kg)(9.81 m/s²)F = 11772 N.
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Special relativity tells us that A. Different observers must agree on the order in which all events occur. B. Different observers must always agree on the order in which all events happen, but can disagree on whether they happen at the exact same time. C. Different observers must agree on the order events happen if the events occur in the same location. D. Different observers can disagree on the order of events even when the events are causally connected.
Answers
The correct answer is B. Different observers must always agree on the order in which all events happen, but can disagree on whether they happen at the exact same time.
Special relativity, as formulated by Albert Einstein, introduced the concept that the order in which events occur is not absolute but can be relative to different observers.
However, there is a fundamental principle in special relativity known as causality, which states that the order of cause and effect must be preserved.
This means that if one event can causally influence another event, all observers must agree on the order of these causally connected events.
However, special relativity also introduced the concept of relative simultaneity, which means that different observers moving relative to each other can have different perceptions of whether two events happen at the exact same time.
This is due to the relativity of time and the fact that the notion of "simultaneity" depends on the observer's reference frame.
Therefore, different observers can disagree on the simultaneity of events, but they must agree on the overall order in which events happen, especially if they are causally connected.
So, option B is correct: Different observers must always agree on the order in which all events happen, but can disagree on whether they happen at the exact same time.
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A satellite has a mass of 90 kg and is located at 1.96 x 106 m above the surface of Earth. (a) What is the potential energy associated with the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite?
Answers
(a) To calculate the potential energy associated with the satellite at its location, we can use the formula:
Potential Energy = mgh
Given:
Mass of the satellite (m) = 90 kgHeight above the surface of the Earth (h) = 1.96 x 10^6 mThus, potential energy:
Potential Energy = 90 kg * 9.8 m/s^2 * 1.96 x 10^6 m
Potential Energy ≈ 1.687 x \(10^{10\) J
Therefore, the potential energy associated with the satellite at its location is approximately 1.687 x \(10^{10\) J.
(b) The magnitude of the gravitational force on the satellite can be determined using the formula:
Gravitational Force = mg
Given:
Mass of the satellite (m) = 90 kg
Acceleration due to gravity (g) = 9.8 m/s^2
Thus:
Gravitational Force = 90 kg * 9.8 m/s^2
Gravitational Force = 882 N
Therefore, the magnitude of the gravitational force on the satellite is 882 Newtons.
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Engine Misfire Diagnosis Based on the Torsional Vibration of the Flexible Coupling in a Diesel Generator Set: Simulation and Experiment
Answers
In a diesel generator set, flexible couplings are frequently utilized to accommodate various imperfections including misalignments and torque variations. On the other hand, severe vibration brought on by frequent engine misfires can result in premature failures of the couplings as well as the entire generator set.
Additionally, the connection has an impact on early misfires brought on by problems with fuel injection and cylinder seals as well as detection performance. This study examines both theoretically and experimentally the torsional vibration and dynamic torque of the flexible coupling that connects a 6-cylinder diesel engine to a dynamometer.
Methods This system is a typical diesel generator set that has been transformed using the Lagrange equation method into a 10-DOF torsional dynamic system. The model is used to predict the effects of various misfire conditions on the dynamic torque on the coupling after the model has been verified by measuring vibration responses at the free end and the coupling with a magnetic speed sensor and a wireless torque sensor. This aids in the development of reliable diagnostic features for misfire detection and diagnosis.
Results and Interpretations Results indicate that the torsional vibration and load of the flexible coupling are significantly influenced by diesel engine misfires (more than five times more) than the dynamic torque is. Although both the torque of the flexible coupling and the torsional vibration can be used to detect the occurrence of diesel engine misfires, the vibration somewhat outperforms the torque in terms of pinpointing the misfired cylinders.
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Why do we feel the force of gravity from the Earth but we don’t feel the force of gravity from the moon?
Answers
Answer:
The gravitational force on the moon is less than on Earth because the strength of gravity is determined by an object's mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere. We just feel it in different ways depending on our state of motion.
Explanation:
Hope this helped!!
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When does an object moving in a straight line at constant speed have a non-zero angular momentum?
a) never
b) always
c) sometimes
Answers
Answer: Yes, it can be possible that an object have non zero angular momentum.
Explanation:
There is a concept of frame of reference.
When your frame of reference is not on that straight line where the object is moving then the object will have non zero angular momentum .
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