Question 1

Which of the following is a vector quantity?

Accepted Answer

Acceleration

Question 2

A car moves with a velocity of $$v_0 = 10$$\ \mathrm{m/s}$$ and accelerates at a = 2$$\ \mathrm{$$m/s^2$$}$$ for 5$ seconds. What is its final velocity?

Accepted Answer

$$v = 20\ \mathrm{m/s}$$

Question 3

Which equation correctly describes the displacement $$d of an $$object under uniform acceleration?

Accepted Answer

$$d = v_0$ t + \frac{1}{2} a t^2$

Question 4

A runner starts from rest and reaches a velocity of $$6\ \mathrm{m/s} in$$ $$2$$ seconds. What is the runner's average acceleration?

Accepted Answer

$$a = 3\ \mathrm{m/s^2$}$$

Question 5

Which of the following statements about acceleration is correct?

Accepted Answer

Acceleration occurs when an object's speed or direction changes, or both.

Question 6

A race car traveling at $$90\ \mathrm{m/s}$$ slows down at a constant rate of $$11\ \mathrm{m/s^2$}$$ for $$4$$ seconds. What is its speed after $$4$$ seconds?

Accepted Answer

$$v = 46\ \mathrm{m/s}$$

Question 7

Which of the following is NOT a scalar quantity?

Accepted Answer

Force

Question 8

If the velocity and acceleration of an object are in opposite directions, what happens to the object's speed?

Accepted Answer

The speed decreases.

Question 9

A ball is thrown straight up with an initial velocity of $$v_0 = 20$$\ \mathrm{m/s}$$. If the acceleration due to gravity is a = -9.8$$\ \mathrm{$$m/s^2$$}$$, how long does it take to reach its highest point?

Accepted Answer

$$t = 2.04\ \mathrm{s}$$

Question 10

Which of the following best describes how a vector quantity is represented graphically?

Accepted Answer

By an arrow whose length is proportional to the magnitude and direction shows the vector's direction

Question 11

A car starts from rest and accelerates uniformly at $$a = 4\ \mathrm{m/s^2$}$$ for $$3$$ seconds. What distance does it cover in this time?

Accepted Answer

$$d = 36\ \mathrm{m}$$

Question 12

Which of the following is the correct SI unit for acceleration?

Accepted Answer

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

Question 13

A cyclist moves with a constant velocity of $$12\ \mathrm{m/s}$$ for $$10$$ seconds. What is the total displacement?

Accepted Answer

$$d = 120\ \mathrm{m}$$

Question 14

Which of the following scenarios involves acceleration?

Accepted Answer

A ball thrown upward and slowing down

Question 15

A car traveling at $$v_0 = 90$$\ \mathrm{m/s}$$ slows down at a = -11$$\ \mathrm{$$m/s^2$$}$$ for 8$ seconds. What is its final speed?

Accepted Answer

$$v = 2\ \mathrm{m/s}$$

Question 16

Which formula gives the average acceleration $$a$$ over a time interval $$\Delta t$$?

Accepted Answer

$$a = \frac{\Delta v}{\Delta t}$$

Question 17

A car moves with an initial velocity $$v_0 = 0$$\ \mathrm{m/s}$$ and accelerates at a = 5$$\ \mathrm{$$m/s^2$$}$$ for 4$ seconds. What is the displacement?

Accepted Answer

$$d = 40\ \mathrm{m}$$

Question 18

Which of the following is true about uniform acceleration motion?

Accepted Answer

Acceleration is constant.

Question 19

A car traveling at $$v_0 = 90$$\ \mathrm{m/s}$$ slows down at a = -11$$\ \mathrm{$$m/s^2$$}$$ for 2$ seconds. What distance does it travel during this time?

Accepted Answer

$$d = 158\ \mathrm{m}$$

Kinematics: Vectors, Velocity, and Acceleration

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