Name Ch 2 Sample Multiple Choice Questions Kinematics in One Dimension ...

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Ch 2 Sample Multiple Choice Questions ? Kinematics in One Dimension

Note : Unless otherwise noted, use g = 10 m/s2 and neglect air resistance.

1. The displacement of an object for a round trip between two locations (A) is always greater than zero. (B) is always less than zero. (C) is zero. (D) can be greater than or less than but not equal to zero. (E) can have any value.

2. The graph to the right shows the instantaneous velocity of a car during 15 s of its motion. Which of the following statements concerning the cars motion is correct? (A) The car is at rest from 5 s to 15 s. (B) The car travels 30 meters during the first 5 seconds. (C) The instantaneous acceleration of the car at 10 seconds is 3.0 m/s2. (D) The car travels a greater distance from 5 s to 10 s than it does from 0 s to 5 s. (E) The car's acceleration is never zero.

3. A bus starting from a speed of +24 m/s slows to 6 m/s in a time of 3 s. The average acceleration of the bus is

(A) 2 m/s2

(B) 4 m/s2

(C) 6 m/s2

(D) ? 2 m/s2 (E) ? 6 m/s2

4. A train accelerates from rest with an acceleration of 4 m/s2 for a time of 20 s. What is the train's speed at the end of 20 s?

(A) 0.25 m/s

(B) 4 m/s

(C) 2.5 m/s

(D) 0.8 m/s

(E) 80 m/s

5. A football player starts from rest 10 meters from the goal line and accelerates away from the goal line at 5 m/s2. How far

from the goal line is the player after 4 s?

(A) 20 m

(B) 30 m

(C) 40 m

(D) 50 m

(E) 60 m

Questions 6-8 A ball is thrown straight upward with a speed of 12 m/s.

6. What is the ball's acceleration just after it is thrown?

(A) Zero (B) 10 m/s2 upward

(C) 10 m/s2 downward (D) 12 m/s2 upward

(E) 12 m/s2 downward

7. How much time does it take for the ball to rise to its maximum height?

(A) 24 s

(B) 12 s

(C) 10 s

(D) 2 s

(E) 1.2 s

8. What is the approximate maximum height the ball reaches?

(A) 24 m

(B) 17 m

(C) 12 m

(D) 7 m

(E) 5 m

9. A ball has been thrown vertically upward. The graph to the right shows the ball's position as a function of time. Which one of the following statements best describes the motion of the ball? (A) The velocity of the ball is the same at points A, B, C, D, and E. (B) The acceleration of the ball is 10 m/s2 at points A, B, D, and E and zero at point C. (C) The acceleration of the ball is ?10 m/s2 at points A, B, D, and E and zero at point C. (D) The ball is the same distance above the ground at points B and D. (E) The velocity of the ball changes continuously during its flight.

10. An object is dropped from rest near the surface of Earth. If the time interval during which it falls is doubled, the distance it

falls will

(A) double.

(B) quadruple.

(C) decrease by ?

(D) decrease by ?

(E) not change

11. An object falling near the surface of Earth has a constant acceleration of 10 m/s2. This means that the (A) object falls 10 m during the first second of its motion. (B) object falls 10 m during each second of its motion. (C) speed of the object increases by 10 m/s during each second of its motion. (D) speed of the object as it falls is 10 m/s (E) acceleration of the object increases by 10 m/s2 during each second of its motion.

12. An object is released from rest on a planet that has no atmosphere. The object falls freely for 2.0 meters in the first second.

What is the magnitude of the acceleration due to gravity on the planet?

(A) 0.25 m/s2

(B) 0.50 m/s2

(C) 2.0 m/s2

(D) 4.0 m/s2

(E) 9.8 m/s2

13. Which of the following pairs of graphs shows the distance traveled versus time and the speed versus time for an object uniformly accelerated from rest at time t = 0?

(A)

(B)

(C)

(D)

(E)

14. Which line(s) in the displacement time graph above correspond(s) to an object whose speed is decreasing with time.

(A) 1 only

(B) 3 only

(C) 4 only

(D) 1 and 3 only

(E) 1 and 4 only (F) 1, 3, and 4 only

(G) 1, 2, 3, and 4

15. Ball 1 is dropped from rest at time t = 0 from a tower of height h, as shown above. At the same instant, ball 2 is launched

upward from the ground with initial speed v0. If air resistance is negligible, at what time t will the two balls pass each

other?

(A) 1

4 0

(B) 1

2 0

(C)

0

(D) 2

0

(E) 4

0

Answers 1. C 2. D 3. E 4. E 5. D 6. C 7. E 8. D 9. E 10. B 11. C 12. D 13. E 14. E 15. C

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