1. Review for Quiz
Review Homework
Quiz overview
In class review options

2. Newton’s 3rd Law

3. Homework Review: Newton’s Third Law Worksheet
Label at least 6 action-reaction forces present in the diagram below.

4. 2. When you jump up, does the world recoil downward? Explain.
Yes.
For every action there is an equal and opposite reaction.

5. How do the accelerations of the rifle and bullet compare? Why?
3. When a rifle is fired, how does the size of the force of the rifle on the bullet compare to the force of the bullet on the rifle?
How do the accelerations of the rifle and bullet compare? Why?
The acceleration of the gun is much less than the bullet because it has more mass.

6. Which vehicle undergoes the greater change in acceleration? Why?
4. If a bicycle and a massive truck have a head-on collision, upon which vehicle is the impact force greater?
The force is the same.
Which vehicle undergoes the greater change in acceleration? Why?
The bicycle because it has less mass.

7. 5. Suppose two carts, one twice as massive as the other, fly apart when the compressed spring that joins them is released. How fast does the heavier cart roll compared to the lighter cart? Explain.
The heavier cart will accelerate half as fast as the smaller cart.

8. What was the acceleration of the truck when it hit the car?
6. A semi-truck collides with a car with a force of 5000N. The semi-truck has a mass of 2000kg and the car has a mass of 500kg.
What was the acceleration of the truck when it hit the car?
Acceleration = Force / Mass
Acceleration = 5000N / 2000 kg
Acceleration = 2.5 m/s/s

9. 6. A semi-truck collides with a car with a force of 5000N
6. A semi-truck collides with a car with a force of 5000N. The semi-truck has a mass of 2000kg and the car has a mass of 500kg.
What force did the car exert on the semi-truck at impact?
5000N
How much did the car accelerate when it was hit?
Acceleration = Force / Mass
Acceleration = 5000N/ 500kg = 10 m/s/s
If the action statement is ‘The semi-truck exerts a force on the car,’ what is the reaction statement?
The car exerts an equal and opposite force on the truck.

10. What force of impact does the sumo wrestler have with Spongebob?
7. A sumo wrestler has a wrestling match with Spongebob. The sumo wrestler has a mass of 150kg and accelerates toward the midget at 5m/s2. Spongebob has a mass of 30kg.
What force of impact does the sumo wrestler have with Spongebob?
F= M x A F=150kg x 5m/s/s F= 750N
What force upon impact does Spongebob have with the sumo wrestler?
F= 750N
How much does Spongebob accelerate due to the impact with the wrestler?
Acceleration = Force / Mass A= 750N / 30kg A = 25 m/s/s
If the action statement is ‘The sumo wrestler exerts a force on Spongebob,’ what is the reaction statement?
Spongebob exerts a force on the sumo wrestler.

11. Final Quiz: Free Body Diagrams and Newton’s Laws of Motion
Draw and interpret
Newton’s First Law
Unbalanced forces
Inertia
Newton’s Second Law
F= ma
A = f/m
M = f/a
Use the words force, mass, and acceleration to explain motion.
Newton’s Third Law
Action/Reaction pairs
Equal and Opposite

13. a. The windshield hits the bug.
b. The forces are the same.

15. Because the gun has a larger mass, it will have a smaller acceleration when the same force is applied.

21. The bug’s motion changes more because it has less mass.

23. Final Quiz: Free Body Diagrams and Newton’s Laws of Motion
Draw and interpret
Newton’s First Law
Unbalanced forces
Inertia
Newton’s Second Law
F= ma
A = f/m
M = f/a
Use the words force, mass, and acceleration to explain motion.
Newton’s Third Law
Action/Reaction pairs
Equal and Opposite

25. What could it be?: Free Body Diagrams

26. What could it be?: Free Body Diagrams

27. What could it be?: Free Body Diagrams

28. Net Force

29. Explain.

30. Explain.

31. Explain.

32. Which Law?

33. Explain.

34. A person jumps. Explain.
m x a = F = F = m x a

35. Truck hits squirrel. Explain.
m x a = F = F = m x a

36. Equations:
FORCE =

37. Equations:
MASS =

38. Equations:
ACCELERATION =

39. Final Quiz: Free Body Diagrams and Newton’s Laws of Motion
Draw and interpret
Newton’s First Law
Unbalanced forces
Inertia
Newton’s Second Law
F= ma
A = f/m
M = f/a
Use the words force, mass, and acceleration to explain motion.
Newton’s Third Law
Action/Reaction pairs
Equal and Opposite