Question 1

A ball is thrown straight up and reaches its highest point. What is the acceleration of the ball at that instant?

Accepted Answer

9.8 m/s² downward, due to gravity.

Question 2

A car traveling at 20 m/s comes to a stop with a constant acceleration of -4 m/s². What is the stopping distance?

Accepted Answer

50 m

Question 3

A runner accelerates from rest at 2 m/s² for 5 seconds. How far does the runner travel in this time?

Accepted Answer

25 m

Question 4

A cyclist slows down from 12 m/s to 0 m/s in 3 seconds with constant acceleration. What is the acceleration?

Accepted Answer

-4 m/s²

Question 5

A stone is dropped from rest from a bridge and hits the water after 2 seconds. What is the distance fallen? (Assume g = 9.8 m/s²)

Accepted Answer

19.6 m

Question 6

A car decelerates from 30 m/s to rest over a distance of 90 m. What is the magnitude of its acceleration?

Accepted Answer

5 m/s²

Question 7

A ball is thrown upward with an initial velocity of 15 m/s. How long does it take to reach its highest point? (g = 9.8 m/s²)

Accepted Answer

1.53 s

Question 8

A train moving at 40 m/s applies brakes and stops in 8 seconds with constant acceleration. What is the distance covered during braking?

Accepted Answer

160 m

Question 9

A car accelerates from 10 m/s to 30 m/s in 5 seconds. What is the average velocity during this time?

Accepted Answer

25 m/s

Question 10

A rocket is launched straight up with an initial velocity of 50 m/s. Ignoring air resistance, how high does it go before stopping momentarily? (g = 9.8 m/s²)

Accepted Answer

127.6 m

Question 11

A car moving at 15 m/s comes to a stop in 5 seconds with constant acceleration. What is the acceleration?

Accepted Answer

-3 m/s²

Question 12

A ball is thrown downward with an initial velocity of 5 m/s from a height of 20 m. How long does it take to hit the ground? (g = 9.8 m/s²)

Accepted Answer

2.0 s

Question 13

A car accelerates from rest at 3 m/s². How far does it travel in 4 seconds?

Accepted Answer

24 m

Question 14

A cyclist increases speed from 5 m/s to 15 m/s in 5 seconds. What is the acceleration?

Accepted Answer

2 m/s²

Question 15

A car traveling at 25 m/s must stop in 100 m. What is the required acceleration?

Accepted Answer

-3.125 m/s²

Question 16

A ball is thrown upward with an initial velocity of 20 m/s. What is its velocity after 2 seconds? (g = 9.8 m/s²)

Accepted Answer

0.4 m/s upward

Question 17

A car starts from rest and accelerates at 2 m/s² for 10 seconds. What is its final velocity?

Accepted Answer

20 m/s

Question 18

A person jumps off a 45 m high cliff. How long does it take to reach the ground? (g = 9.8 m/s²)

Accepted Answer

3.03 s

Key Concepts in Kinematics and Motion Problems

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