You throw a ball vertically upward. After the ball has left your hand and is moving upward, what forces, if any, act on the ball? a) only an upward force b) an upward and a downward force c) no forces d) only a downward force

You throw a ball vertically upward. After the ball has left your hand and is moving upward, what forces, if any, act on the ball? a) only an upward force b) an upward and a downward force c) no forces d) only a downward force

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter4: Forces In One Dimension

Section: Chapter Questions

Problem 44A

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Question

Please do question 9, 10, and 11

9. You throw a ball vertically upward. After the ball has left your hand and is moving upward,
what forces, if any, act on the ball?
a) only an upward force
b) an upward and a downward force
c) no forces
d) only a downward force
10. An out-of-gas car is rolling over the top of a hill at speed
v as shown in the diagram at right. The two forces shown
are the normal force (n) and the force of gravity (FG). At
this instant,
а) п> FG
b) п<FG
c) n= FG
d) We can't determine the relationship without knowing
the specific value for the speed v.
2013 Pearson Education, Inc
11. You are sitting on a chair. The chair pushes up on you. What is the reaction to this force?
a) the chair pushing down on the earth
b) you pulling up on the earth through gravitational attraction
c) the earth pushing up on the chair
d) you pushing down on the chair

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