Question 1

A student’s position as a function of time is shown in the first image. Which of the following statements best describes the student’s motion between $$t = 0$$ and $$t = 10$$ min?

Accepted Answer

The student’s velocity increases with time (accelerates).

Question 2

Refer to the second image (motion diagram). What does the equal spacing between the dots indicate about the object’s motion?

Accepted Answer

The object is moving with constant velocity.

Question 3

In the third image, the position-versus-time graph shows two segments with different slopes. What does the change in slope at $$t = 6$$ min indicate?

Accepted Answer

The object’s velocity decreases but remains positive.

Question 4

Which velocity-versus-time graph (fifth image) best represents an object that moves with a positive constant velocity and then suddenly stops?

Accepted Answer

Graph C

Question 5

In the eighth image, the position-versus-time graph is a straight line. What does this tell you about the object’s velocity?

Accepted Answer

The velocity is constant.

Question 6

Refer to the ninth image. What is the velocity of the object between $$t = 2 s $$and $$t = 4 s$$?

Accepted Answer

$$-10\ \mathrm{m/s}$$

Question 7

The tenth image shows a position-versus-time graph that curves upward. What does this indicate about the object’s acceleration?

Accepted Answer

The object has constant positive acceleration.

Question 8

In the twelfth image, at what time do objects 1 and 2 have the same velocity?

Accepted Answer

At time $$t_0$$

Question 9

A car slows down from $$15\ \mathrm{m/s} to $$rest in $$1.5\ \mathrm{s} ($$see image 19). What is the car’s acceleration?

Accepted Answer

Question 10

A Boeing 747 accelerates at $$2.6\ \mathrm{m/s^2$}$$ from rest to $$70\ \mathrm{m/s}. $$What is the minimum runway length required for takeoff?

Accepted Answer

$$940\ \mathrm{m}$$

Question 11

A ball is dropped from rest and falls freely under gravity (see image 33). Which of the following statements is true?

Accepted Answer

The ball’s acceleration is constant and directed downward.

Question 12

A springbok leaps straight up with an initial speed of $$7.0\ \mathrm{m/s}. $$What is the maximum height it reaches? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$2.5\ \mathrm{m}$$

Question 13

Which kinematic equation would you use to find the final velocity of an object given its initial velocity, acceleration, and displacement?

Accepted Answer

$$v_f^2$ = v_i^2$ + 2a \Delta x$$

Question 14

A car travels at $$20\ \mathrm{m/s}$$ for $$5\ \mathrm{s}$$, then accelerates at $$2\ \mathrm{m/s^2$}$$ for another $$5\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$30\ \mathrm{m/s}$$

Question 15

An object moves with constant acceleration. Which of the following is true about its velocity-versus-time graph?

Accepted Answer

It is a straight line.

Question 16

A ball is thrown straight up. At the highest point of its trajectory, what is its acceleration?

Accepted Answer

$$9.8\ \mathrm{m/s^2$}$$ downward

Question 17

A train travels 12 km in 10 minutes at constant speed. How long will it take to travel 60 km at the same speed?

Accepted Answer

50 minutes

Question 18

Which of the following best describes the area under a velocity-versus-time graph?

Accepted Answer

It represents the object’s displacement.

Motion in One Dimension: Position, Velocity, and Acceleration

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