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# Multiple Choice Questions

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## Multiple Choice Practice for Energy

Welcome to Unit 4 AP Physics 1 Multiple Choice Questions! Grab some paper and a pencil π to record your answers as you go. You can see how you did on the Unit 4 Practice Questions Answers and Review sheet once you're done. Don't worry, we have tons of resources available if you get stumped π on a question. And if solo study is not your thing, join a group in Hours!
Not ready to take a quiz yet? Take a look at the Intro to Unit 4.

Image courtesy of Pixabay

Facts about the test: The AP Physics 1 exam has 50 multiple choice questions (45 single-select and 5 multiple-select) and you will be given 90 minutes to complete the section. That means it should take you around 15 minutes to complete 8 questions.
The following questions were not written by College Board and, although they cover information outlined in the AP Physics 1 Course and Exam Description, the formatting on the exam may be different.

1.Β A 2 kg block is released from rest from the top of an inclined plane, as shown in the diagram. There is no friction between the block and the surface. How much work is done by the gravitational force on the block?
A. 20 JΒ Β
B. 40 J
C. 60 J
D. 80 J

2.Β A 2 kg block is released from rest from the top of an inclined plane, as shown in the diagram. There is no friction between the block and the surface. hat is the speed of the block when it reaches the horizontal surface?
A.Β 3.2 m/s
B. 4.3 m/s
C. 5.8 m/s
D. 7.7 m/s

3.Β A driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate the sports car from 30 m/s to 60 m/s in 9 seconds?
A.Β 1,800 J
B. 5,000 J
C. 100,000 J
D. 300,000 J

4.Β A force of 20 N compresses a spring with a spring constant 50 N/m. How much energy is stored in the spring?
A.Β 2 J
B. 4 J
C. 5 J
D. 6 J

5.Β An object with a mass of 2.0 kg is
initially at rest at a position x = 0. A non constant force F
is applied to the object over a displacement of 6.0 m, as
shown in the graph. What is the total work done on the object at the end of 6.0 m?
A.Β 150 J
B. 170 J
C. 190 J
D. 200 J

6. Rockets are launched from an airplane in the forward direction of motion. The kinetic energy of the airplane will be
A.Β decreased
B. unchanged
C. increased
D. increased then decreased

7.Β An arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat, how much kinetic energy will it have after it has been shot?
A.Β 0 J
B. 35 J
C. 70 J
D. 140 J

8.Β As a pendulum swings back and forth
A.Β at the end points of its swing, its energy is all potential.
B. at the lowest part of its swing, its energy is all kinetic.
C. kinetic energy is transformed into potential energy.
D. All of the choices are correct!

9.Β The amount of potential energy possessed by an elevated object is equal to
A.Β the force needed to lift it.
B. the distance it is lifted.
C. the power used to lift it.
D. the work done in lifting it.

10.Β When a carβs speed triples, its kinetic energy
A. remains the same.Β Β
B. triples.
C. increases four times.
D. increases nine times.

11.Β A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of work but different amounts of
A.Β Power
B. Kinetic energy
C. Potential energy
D. Spring energy

12.Β A ball is thrown into the air with 200 J of kinetic energy, which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is
A. less than 200 J.Β Β
B. 200 J.
C. more than 200 J.
D. Not enough information is given.

13.Β If an object has kinetic energy, then it also must have
A.Β acceleration.
B. force.
C. impulse.
D. momentum.

14.Β A constant force, F, is applied to a block sitting on a bench. In which of the following cases is no work done on the block by F?
A. When the force is applied at a 25 degree angle to the motion.Β Β
B. When the force is applied perpendicular to the block's motion.
C. When the force is applied parallel to the blocks motion.
D. When the force is applied anti-parallel to the blocks motion.

15.Β A crane lifts a 300 kg load at a constant speed to the top of a building 60 m high in 15 s. The average power expended by the crane to overcome gravity is:
A.Β 10,000 W
B. 12,000 W
C. 15,000 W

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