College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question

1. If the kinetic energy of an arrow is doubled, by what factor has its speed increased?
(a) √2
(b) 2
(c) 4
(d) 1
2. If the speed of an arrow is doubled, by what factor does its kinetic energy increase?
(a) 8
(b) 4
(c) 2
(d) 16
3. By how much does the gravitational potential energy of a 64 kg pole vaulter change if
his center of mass rises about 4 m during the jump?
(a) 2000 J
(b) 2100 J
(c) 2500 J
(d) 2600 J
4. A 55 kg hiker starts at an elevation of 1600 m and climbs to the top of a 3300 m peak.
What is the hiker’s change in potential energy?
(a) 917235 J
(b) 916235 J
(c) 918235 J
(d) 915235 J

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