University Physics with Modern Physics 14th Edition By Young - Test Bank - Updated 2025

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) If the acceleration of an object is negative, the object must be slowing down.

A) True B) False

Answer: B

2) If the graph of the position as a function of time for an object is a horizontal line, that

object cannot be accelerating.

A) True B) False

Answer: A

3) If an object is accelerating toward a point, then it must be getting closer and closer to

that point.

Answer: B

A) True B) False

4) When can we be certain that the average velocity of an object is always equal to its

instantaneous velocity?

A) only when the acceleration is constant

B) always

C) only when the acceleration is changing at a constant rate

D) never

E) only when the velocity is constant

Answer: E

5) Suppose that an object is moving with constant nonzero acceleration. Which of the

following is an accurate statement concerning its motion?

A) In equal times its velocity changes by equal amounts.

B) In equal times it moves equal distances.

C) In equal times its speed changes by equal amounts.

D) A graph of its position as a function of time has a constant slope.

E) A graph of its velocity as a function of time is a horizontal line.

Answer: A

6) Suppose that a car traveling to the west (the -x direction) begins to slow down as it

approaches a traffic light. Which statement concerning its acceleration in the x

direction is correct?

A) Its acceleration is negative but its velocity is positive.

B) Both its acceleration and its velocity are negative.

C) Both its acceleration and its velocity are positive.

D) Its acceleration is positive but its velocity is negative.

Answer: D

1)

2)

3)

4)

5)

6)

17) The motion of a particle is described in the velocity versus time graph shown in the

figure. We can say that its speed

A) decreases. C) increases. Answer: D

B) increases and then decreases.

D) decreases and then increases.

8) The motions of a car and a truck along a straight road are represented by the

velocity-time graphs in the figure. The two vehicles are initially alongside each other at

time t = 0. At time T, what is true about these two vehicles since time t = 0?

A) The truck will have traveled further than the car.

B) The car will be traveling faster than the truck.

C) The truck and the car will have traveled the same distance.

D) The car will have traveled further than the truck.