Question 1

A car travels 150 km in 3 hours. What is its average speed?

Accepted Answer

$$50\ 	ext{km/h}$$

Question 2

Which of the following best describes velocity?

Accepted Answer

The speed of an object in a given direction

Question 3

A ball is dropped from rest and falls freely under gravity. What is its speed after 4 seconds? (Assume $$g = 10\ 	ext{m/s}^2)$$

Accepted Answer

$$40\ 	ext{m/s}$$

Question 4

Which scenario involves acceleration?

Accepted Answer

Both slowing down to a stop and rounding a curve at steady speed

Question 5

What is the distance covered by a freely falling object starting from rest after 3 seconds? (Assume $$g = 10\ 	ext{m/s}^2)$$

Accepted Answer

$$45\ 	ext{m}$$

Question 6

A kicker can kick a ball about 125 m straight up. How long will the ball be in the air? (Assume $$g = 10\ 	ext{m/s}^2)$$

Accepted Answer

$$15\ 	ext{s}$$

Question 7

What is the velocity of the ball when it returns to the ground after being kicked 125 m straight up? (Assume $$g = 10\ 	ext{m/s}^2)$$

Accepted Answer

$$50\ 	ext{m/s}$$

Question 8

What is the velocity of the ball at the top of its trajectory after being kicked straight up?

Accepted Answer

$$0\ 	ext{m/s}$$

Question 9

A rock is dropped from a cliff and hits the ground after 10 seconds. How high is the cliff? (Assume $$g = 10\ 	ext{m/s}^2)$$

Accepted Answer

$$500\ 	ext{m}$$

Question 10

Which of the following statements about acceleration is correct?

Accepted Answer

Acceleration is the rate at which velocity changes over time

Question 11

If a car’s speed increases from 20 m/s to 40 m/s in 4 seconds, what is its acceleration?

Accepted Answer

$$5\ 	ext{m/s}^2$$

Question 12

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 13

A car travels 60 km in 2 hours. What is its average speed?

Accepted Answer

$$30\ 	ext{km/h}$$

Question 14

If an object is moving at constant velocity, which of the following must be true?

Accepted Answer

It is moving at constant speed in a straight line

Question 15

A freely falling object has a speed of 30 m/s at one instant. Exactly 1 second later, its speed will be:

Accepted Answer

More than 35 m/s

Question 16

Which equation correctly describes the distance fallen by an object starting from rest under free fall?

Accepted Answer

$$d = \frac{1}{2}gt^2$

Question 17

Which of the following is a correct unit for acceleration?

Accepted Answer

$$	ext{m/s}^2$$

Question 18

A car rounds a curve at a steady speed. What is true about its acceleration?

Accepted Answer

It is accelerating because its direction is changing

Question 19

If a ball rolls down a steeper incline, what happens to its acceleration?

Accepted Answer

Acceleration increases

Question 20

Which formula gives the velocity acquired by an object in free fall starting from rest?

Accepted Answer

$$v = gt$$

Linear Motion: Speed, Velocity, and Acceleration

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