COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 79QAP
To determine
The length of the girl's arm from the pivot point at her shoulder.
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dynamics (mech)
A game requires that two children throw a ball upward as high as possible at the same point and then to run horizontally in opposite directions. The child who travels the greater distance before their thrown ball impacts the ground winds. One child throws the ball at his arm’s height of 4.5 ft at a speed of 69 ft/sec and runs leftward at a speed of 16 ft/sec. The other child does the same but was able to throw better releasing his ball at a heigh of 6 ft at a speed of 71 ft/sec then runs rightward at a speed of 17 ft/sec. Which child wins the game?
Problem-6 An egg is thrown horizontally with a speed of 2.5m/s from the top of a 5-story (about
40.m-tall) building. Neglecting wind resistance:
(a) How far horizontally from the base of the building does the egg land?
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(b) What is the speed of the egg at the instantaneous moment just before it hits the ground?
The following table lists data for the speed and radius of three examples of uniform circular motion. Find the magnitude of the
centripetal acceleration for each example.
Example 1
Example 2
Example 3
Radius
0.68m
Infinitely large
1.9m
(a) Example 1: a = Number i
(b) Example 2: ac = Number i
(c) Example 3: ac = Number i
Speed
14m/s
43m/s
3.7 m/s
Units
Units
Units
<
<
<
Chapter 3 Solutions
COLLEGE PHYSICS
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