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Linear Motion Homework Questions 1  - 
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Linear Motion Homework 1 Study Guide

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

A train travels 6 meters in the first second of travel, 6 meters again during the second second of travel, and 6 meters again during the third second. Its acceleration is
a.
0 m/s2.
b.
6 m/s2.
c.
12 m/s2.
d.
18 m/s2.
e.
none of the above
 

 2. 

A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s average acceleration?
a.
0.17 m/s2
b.
1.67 m/s2
c.
6 m/s2
d.
7 m/s2
e.
none of the above
 

 3. 

Suppose you take a trip that covers 180 km and takes 3 hours to make. Your average speed is
a.
30 km/h.
b.
60 km/h.
c.
180 km/h.
d.
360 km/h.
e.
540 km/h.
 

 4. 

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car's acceleration?
a.
5 km/h·s
b.
10 km/h·s
c.
35 km/h·s
d.
40 km/h·s
e.
45 km/h·s
 

 5. 

A ball is thrown straight up. At the top of its path its instantaneous speed is
a.
0 m/s.
b.
about 5 m/s.
c.
about 10 m/s.
d.
about 20 m/s.
e.
about 50 m/s.
 

 6. 

A ball is thrown straight up. At the top of its path its acceleration is
a.
0 m/s2.
b.
about 5 m/s2.
c.
about 10 m/s2.
d.
about 20 m/s2.
e.
about 50 m/s2.
 

 7. 

When something falls to the ground, it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter g. What is the value of g on Earth's surface?
a.
0 m/s2
b.
about 5 m/s2
c.
about 10 m/s2
d.
about 20 m/s2
e.
about 50 m/s2
 

 8. 

A car accelerates at 2 m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 20 m/s?
a.
2 seconds
b.
10 seconds
c.
20 seconds
d.
40 seconds
e.
none of the above
 

 9. 

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by
a.
about 5 m/s.
b.
about 10 m/s.
c.
about 15 m/s.
d.
a variable amount.
e.
a rate that depends on its initial speed.
 

Essay 
 

 10. 

Write a short paragraph explaining what acceleration is and why a car is accelerating as it rounds a corner.
 

Problem
 

 11. 

What is the average speed of a cheetah that runs 88 m in 5 seconds?
 

 12. 

A bicycle travels 15 km in 30 minutes. What is its average speed?
 

 13. 

What is the average acceleration of a car that goes from rest to 60 km/h in 8 seconds?
 

 14. 

A jet on an aircraft carrier can be launched from 0 to 40 m/s in 2 seconds. What is the acceleration of the jet?
 

 15. 

A skateboarder starting from rest accelerates down a ramp at 2 m/s2 for 2 s. What is the final speed of the skateboarder?
 

 16. 

Starting from rest, a car undergoes a constant acceleration of 6 m/s2.. How far will the car travel in the first second?
 



 
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