i need the answer quickly 4- Which of the following is NOT a stored form of energy?(a) chemical energy (b) gravitational potential energy (c) kinetic energy (d) elastic potential energy5- A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. Thework done by the force will be_(a) 50J(b) 30J(c) 20J(d) 40J6- Acceleration due to gravity is also called(a) negative velocity(b) displacement(c) free-fall acceleration (d) instantaneous velocity_motion.(d) constant speed7- The motion of a freely falling body is an example of(a) uniformly accelerated (b) non-uniformly accelerated (c) constant velocity8- If a body after travelling some distance comes back to its starting point then(a) average velocity is zero (b) average speed is zero (c) distance traveled is zero9- A block of mass 10 kg accelerates uniformly from rest to a speed of 2 m/s in 20 s. The averagepower developed in time interval of 0 to 20 s is:(d) all the above(a) 1.5 W(b) 0.5 W(c) 2 W(d) 1 W10-If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of itsdisplacement after 7 s?(a) 80 m(b) 40 m(c) 60 m(d) 20 m11- Work done by an object on application of a force would be zero if the displacement of the object is:(a) negative (b) Positive(c) neutral(d) zero12- A body of mass 3 kg accelerates from 10 m/s to 20 m/s in 5 seconds due to the application of a forceon it. Calculate the magnitude of this force (in N).(a) 6(b) 18(c) 12(d) 3613- The capacity to do work is called(a) pressure(b) force(c) power(d) energy

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4- Which of the following is NOT a stored form of energy? (a) chemical energy (b) gravitational potential energy (c) kinetic energy (d) elastic potential energy 5- A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be

4- Which of the following is NOT a stored form of energy? (a) chemical energy (b) gravitational potential energy (c) kinetic energy (d) elastic potential energy 5- A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 69PE: Integrated Concepts A 105-kg basketball player crouches down 0.400 m while waiting to jump. After...

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Physics Review A team of huskies performs 7 440 J of work on a loaded sled of mass 124 kg, drawing it from rest up a 4.60-m high snow-covered rise while the sled loses 1 520 J due to friction, (a) What is the net work done on the sled by the huskies and friction? (b) What is the change in the sleds potential energy? (c) What is the speed of the sled at the top of the rise? (See Section 5.5.)
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
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Describe a situation in which a force is exerted for a long time but does no work. Explain.
. In the annual Empire State Building race, contestants run up 1,575 steps to a height of 1,050 ft. In 2003, Australian Paul Crake completed the race in a record time of 9 min and 33 S, Mr., Crake weighed 143 lb (65 kg) , (a) How much work did Mr., Crake do in reaching the top of the building? (b) What was his average power output (in ft-lb/s and in hp)?
Answer yes or no to each of the following questions. (a) Can an objectEarth system have kinetic energy and not gravitational potential energy? (b) Can it have gravitational potential energy and not kinetic energy? (c) Can it have both types of energy at the same moment? (d) Can it have neither?
In Chapter 7, the work-kinetic energy theorem, W = K, was introduced. This equation states that work done on a system appears as a change in kinetic energy. It is a special-case equation, valid if there are no changes in any other type of energy such as potential or internal. Give two or three examples in which work is done on a system but the change in energy of the system is not a change in kinetic energy.
(a) What is the average useful power output of a person who does 6.00106 J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
A boy starts at rest and slides down a frictionless slide as in Figure P5.64. The bottom of the track is a height h above the ground. The boy then leaves the track horizontally, striking the ground a distance d as shown. Using energy methods, determine the initial height H of the boy in terms of h and d. Figure P5.64
An a simple pendulum swings back and forth, the forces acting on the suspended object are (a) the gravitational force, (b) the tension in the supporting cord, and (c) air resistance, (i) Which of these forces, if any, does no work on the pendulum at any time? (ii) Which of these forces does negative work on the pendulum at all Limes during its motion?
The swimmer shown in Figure 7.44 exerts an average horizontal backward force of 80.0 N with his arm during each 1.80 m long stroke. (a) What is his work output in each stroke? (b) Calculate the power output of his arms if he does 120 strokes per minute. Figure 7.44
(a) How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s? (b) Discuss how the larger energies needed for the movement of larger animals would relate to metabolic rates.