Name:
Date:
Guided Reading Notes:
Newton’s Third Law
Period:
Start on page 74, §6.1 “Forces & Interactions” and answer the following questions as you read:
1. In the simplest sense, a force is a
or a
2. However, Newton realized that a force is not a
, between one thing and another.
an
.
in itself but part of a mutual action,
3. Refer to Figure 6.1 and write the caption below:
Continue to page 75, §6.2 “Newton’s Third Law” and answer the following questions as you read:
4. Newton’s Third Law states:
5. The action and reaction forces are
direction.
6. Forces always appear in
7. When you walk, you
against you.
8. When you swim, you
you
.
in strength and
in
.
against the floor and the floor simultaneously
the water
and the water
9. Refer to Figure 6.3 and answer the question in the caption below:
Continue to page 75, §6.3 “Identifying Action and Reaction” and answer the following questions as you
read:
10. The action and reaction forces can then be stated in the form:
Action: Object A exerts a force on object B.
Reaction:
11. If the action force on a falling boulder is Earth’s gravitational force on the boulder, what is the
reaction force?
12. For each picture below, identify the action and
reaction forces:
13. Action and reaction forces act
.
Continue to page 77, §6.4 “Action and Reaction on Different Masses” and answer the following
questions as you read:
14. The boulder pulls up on Earth with
boulder.
force as the Earth pulls down on the
15. The pair of forces between the boulder and the Earth are the same, but the masses are
. Because Earth has a
mass, we don’t sense the small
16. What happens to the cannon after a cannonball is fired from it?
17. The acceleration of the cannonball and cannon are:
Cannon: F =
Cannonball: F =
acceleration than the same
18. A given force exerted on a small mass produces a
force on a
mass.
19. Referring to Figure 6.8, each molecule of exhaust gas acts like a tiny molecular
shot from the balloon.
20. For a helicopter, the whirling blades are shaped to force air particles downward (
) and
the air forces the blades upward (
). This upward reaction force is called
21. How do birds fly?
Continue to page 78, §6.5 “Do Action and Reaction Forces cancel?” and answer the following
questions as you read:
22. Draw the system or frame of reference around the orange:
23. The apple is applying that for to the
and the system
.
24. Explain why the force from the orange on the apple doesn’t cancel out the force from the apple
on the orange with the system you’ve drawn: