Unit 2 Study Guide: Motion and Force
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
____
1. If a toy truck traveling at 20 cm/s passes a toy truck moving at 20 cm/s in the opposite direction, both cars
have the same speed. __________________________
____
2. Instantaneous speed is the rate at which an object is moving at a given instant. _________________________
____
3. The property of matter that resists a change in motion is called acceleration.
___________________________
____
4. According to Newton’s second law of motion, acceleration depends on an object’s mass and the net force
acting on the object. ______________________________________
Short Answer
5. Speed equals distance divided by ________________.
6. When you know both the speed and direction of an object’s motion, you know the _____________ of the
object.
7. What is the SI unit of acceleration?
8. An object changing direction is an example of ____________________.
9. If you know a truck traveled 500 kilometers in 4 hours, you can find its _____________________
_________________.
10. What happens when 2 forces act in the same direction?
11. The greater the mass of an object, the greater its ________________.
12. Any force that causes an object to move in a circle is called a(n) ________________________
______________________.
13. According to Newton’s third law of motion, when you kick a ball and your foot exerts force on the ball, the
ball ...
14. A soccer ball ____________________________________ when either its speed or direction changes.
15. If a boat is speeding up, its initial speed is ____________________________ that its final speed.
16. The overall force on an object after all the forces are added together is called the __________ force.
17. The force required to accelerate 1 kilogram of mass at 1 meter per second squared is one
_______________________________.
18. According to Newton’s third law of motion, the strength of a reaction force is __________________ the
strength of the action force.
19. What force is need to move a 3 kg skateboard 12 m/s2?
20. A speed boat was moving at 150 km/hr and increased to a speed of 200 km/hr in 10 seconds. What was the
boat’s acceleration?
21. A moped was traveling at a speed of 50 km/hr until is came to a stop in 25 seconds. What was its
acceleration?
22. At a speed of 100 km/hr, you traveled 450 kilometers. How long did it take you to get to your destination?
23. Jermaine went 423 miles in 9 hours. What was his average speed?
24. Newton’s second law of motion states that an obect’s dependes on its mass and on the
_________________________________________ acting on it.
Directions: Use the diagram to answer each question.
25. What variable is on the x-axis? _________________________
What variable is on the y-axis? _________________________
Unit 2 Study Guide: Motion and Force
Answer Section
MODIFIED TRUE/FALSE
1. ANS: T
2. ANS: T
3. ANS: F, Inertia
PTS: 1
4. ANS: T
SHORT ANSWER
5. ANS:
time
PTS: 1
6. ANS:
Velocity
PTS: 1
7. ANS:
m/s2
PTS: 1
8. ANS:
Acceleration
PTS: 1
9. ANS:
Average speed
PTS: 1
10. ANS:
Their strengths are added.
PTS: 1
11. ANS:
Inertia
PTS: 1
12. ANS:
Centripetal force
PTS: 1
13. ANS:
PTS: 1
PTS: 1
PTS: 1
exerts an equal and opposite force on your foot.
PTS: 1
14. ANS:
accelerates
PTS: 1
15. ANS:
less
PTS: 1
16. ANS:
net
PTS: 1
17. ANS:
Newton
PTS: 1
18. ANS:
equal to
PTS: 1
19. ANS:
36 N
PTS: 1
20. ANS:
5 m/s2
PTS: 1
21. ANS:
-2 m/s2
PTS: 1
22. ANS:
4.5 hours
PTS: 1
23. ANS:
47 m/hr
PTS: 1
24. ANS:
net force
PTS: 1
25. ANS:
time
distance