3rd Law of Motion Quizizz Lesson

3rd Law of Motion Quizizz Lesson

Multiple Choice

1. Think back to the types of forces... What type of forces are being exerted when you push down on the table?

• hand exerts a normal force, table exerts a normal force

• hand exerts an applied force, table doesn't exert a force

• hand exerts an applied force, table exerts a normal force

Multiple Choice

2. What are the forces on object A and what is the net force on object A?

• applied force and action force = 100 N

• applied force and friction force = 40 N

• applied force and reaction force = 0 N

Multiple Choice

3. What are the forces on object B and what is the net force on object B?

• reaction force and friction force = 60 N

• action force and friction force = 40 N

• reaction force and friction force = 40 N

Multiple Choice

4. Did the action and reaction force cancel each other out and why or why not?

• Yes because they were equal in size but in opposite directions.

• Yes because they were acting on different objects.

• No because they were acting on different objects.

• No because they were equal in size.

Multiple Choice

5. Which forces did cancel each other out?

• the applied and friction forces

• the applied and reaction forces

• the action and reaction forces

• none of the forces cancelled each other out

Multiple Choice

6. What could be true about the movement of object A and why?

• It stayed at rest because the net force on it was zero; the forces acting on it (applied and reaction forces) were balanced.

• It moved to the right because the applied force was greater than the friction force.

• It moved to the left because the friction force and reaction force together were greater than the applied force.

Multiple Choice

7. What could be true about the movement of object B and why?

• It stayed at rest because the action and reaction forces cancelled each other out.

• It moved to the right because the forces on it (action and friction) were unbalanced, and the action force to the right was greater than the friction force to the left.

• It moved to the left because the friction and reaction forces together were greater than the action force.

Multiple Choice

8. Which is true about the action and reaction forces in Example #1?

• action force - leftward force on the ball; reaction force - rightward force on the hand

• action force - rightward force on the ball; reaction force - leftward force on the hand

• action force - leftward force on the hand; reaction force - rightward force on the ball

Multiple Choice

9. Correctly identify the action force and the reaction force in Example #2:

• action force: the wall's force on the person

  reaction force: the person's force on the wall

• action force: the person's force on the wall

  reaction force: the wall's force on the person

• action force: the person's force on the wall AND the wall's force on the person

  reaction force: the friction forces of the skateboard on the floor

• There is no reaction force in this example.

Multiple Choice

10. Which is true about the action and reaction forces in Example #2?

• They cancelled each other out because they were in opposite directions.

• They cancelled each other out because they were equal in size.

• They did NOT cancel each other out because they were in opposite directions.

• They did NOT cancel each other out because they were exerted on different objects.

Multiple Choice

11. Think back to the 1st Law. What is inertia?

• An object's resistance to a change in speed and/or direction.

• When an object changes its speed and/or direction.

• How heavy an object is - its weight.

Multiple Choice

12. Which has a greater inertia in Example #2?

• the wall

• the person

• the wheels of the skateboard

Multiple Choice

13. Which exerted a greater force in Example #2 and why?

• The wall because the person moved.

• The person because they moved.

• Neither - the force from the wall and the force from the person were equal in size. Other forces were involved in the person's movement.

Multiple Choice

14. Which is true about the direction of the action force and the reaction force in example #4?

• action force: forward

  reaction force: backward

• action force: backward

  reaction force: forward

• action force: backward

  reaction force: no direction

• action force: no direction

  reaction force: forward

Multiple Choice

15. When there are no other forces involved, which force causes which movement in Example #5?

• action force: makes water move backward

  reaction force: makes fish move forward

• action force: makes water move forward

  reaction force: makes fish move backward

• forces don't cause movement

Multiple Choice

16. The air exerts

• a downward force on the bird's wings.

• an upward force on the bird's wings.

• Air cannot exert a force.

Multiple Choice

17. Action force: The blades of a helicopter put a downward force on the air molecules.

• reaction force: the helicopter moves upward.

• reaction force: the air molecules put an upward force on the helicopter blades.

• reaction force: the air molecules put an downward force on the helicopter blades.

Multiple Choice

18. Which would correctly represent the action and reaction forces?

Multiple Choice

19. Which would be the action and reaction forces when skipping a rock?

• action force: The rock applied a downward force on the water.

  reaction force: The water applied an upward force on the rock.

• action force: The rock applied a downward force on the water.

  reaction force: The rock moved upward.

• action force: The water applied an upward force on the rock.

  reaction force: The rock moved upward.

• action force: The rock applied an upward force on the water.

  reaction force: The water applied an upward force on the rock.

Multiple Choice

20. Which would be true about the amount force the water and the rock applied to each other? (the action and reaction forces)

• The forces would be equal in size.

• The rock would exert a greater force on the water than the water exerted on the rock.

• The water would exert a greater force on the rock than the rock exerted on the water.

• Without knowing the other forces invloved it is impossible to say.

Multiple Choice

21. Why would forces A and B not be action and reaction forces?

• Because they are equal in size - action and reaction forces are different sizes.

• Because they are going in oppoisite directions.

• Because there is only one object; action/reaction forces are between two objects.

Multiple Choice

22. A ball hit a box. Which arrow represents the correct reaction force?

• Arrow A

• Arrow B

• Arrow C

• Arrow D

Multiple Choice

23. Why is Arrow A the reaction force?

• Because it is the same length as the action force arrow, meaning it is the same size force.

• Because it is going in the opposite direction of the action force arrow.

• Because of its length AND direction.

Multiple Choice

24. You are canoeing down the Illinois River on a beautiful summer day. Which would be true?

• action force: The paddle puts a backward force on the water.

  reaction force: The water puts a forward force on the paddle.

• action force: The paddle puts a backward force on the water.

  reaction force: The water puts a forward force on the canoe.

• action force: The paddle puts a backward force on the water.

  reaction force: The canoe moves forward.

• The water can only place a reaction force on the paddle if you are going against the current.

Multiple Choice

25. A bug hits the windshield of a moving car. Which would be true?

• The windshield exerted a greater force on the bug, so the bug went splat. (Poor bug!)

• The bug exerted a greater force on the windshield, so the bug went splat. (Poor bug!)

• The windshield exerted the same amount of force on the bug as the bug exerted on the windshield.

Multiple Choice

26. The forces of the bug and the windshield were the same, so which best explains why the bug went splat (Poor bug!) but the windshild didn't break?

• The bug had less mass, so the same force had a greater effect on it.

• They were going in opposite directions, and the forward force always has a greater effect than the backward force.

• The bug is a living thing, and the effect on a living thing is always greater than on a nonliving thing.

Multiple Choice

27. When a swimmer is doing laps, they often make their turn underwater and push off the wall. Which would be true about the action and reaction forces in this picture?

• Action force: The swimmer exerts a rightward force on the wall.

  Reaction force: The wall exerts a leftward force on the swimmer.

• Action force: The swimmer exerts a leftward force on the wall.

  Reaction force: The swimmer moves to the left.

• Action force: The swimmer exerts a rightward force on the wall.

  Reaction force: The wall exerts a leftward force on the water.

Multiple Choice

28. Why is the effect on the swimmer greater than the effect on the wall?

• The swimmer exerted a greater force than the wall.

• The wall exerted a greater force than the swimmer.

• The swimmer had more inertia than the wall, because the swimmer had more mass than the wall. The same force will cause a greater acceleration on an object with more mass.

• The swimmer had less inertia than the wall, because the swimmer had less mass than the wall. The same force will cause a greater acceleration on an object with less mass.