The potential energy gained by a 50 000 kg train after climbing a 20 m hill is a. 1.0 x 106 kg b. 2.5 x 106 kg c. 5.0 x 106 kg d. 9.8 x 10° kg

University Physics Volume 1
18th Edition
ISBN:9781938168277
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Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 23P: A cat’s crinkle ball toy of mass 15 g is thrown straight up with an initial speed of 3 m/s. Assume...
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e What is the potential energy of the spring when it is stretched 0.200 m?
a. 50 J
с. 80J
b. 70J
d. 90 J
9. What is its potential energy when it is compressed 5.00 cm?
а. 5 J
с. О
d. 10 J
b. 7J
10. A 2 kg ball falls freely from a height of 3 m. What is its kinetic energy in joules when it hits the
ground?
а. 20.3 J
с. 62.7 J
b. 58.8 J
d. 1000 J
11. The potential energy gained by a 50 000 kg train after climbing a 20 m hill is
а. 1.0 х 10° kg
b. 2.5 x 106 kg
c. 5.0 x 106 kg
d. 9.8 x 106 kg
12. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10
m/s? )
%3D
a. 50 J
c. 500 J
b. 60 J
d. 600 J
13. A 1 kg mass has a kinetic energy of 1 joule when its speed is
a. 0.45 m/s
b. 1 m/s
с. 1.4 m/s
d. 4.4 m/s
14. An object of mass 1 kg has potential energy of 1 joule relative to the ground when it is at a height of
a. 0.102 m
c. 9.8 m
b. 1 m
d. 32 m
15. A body of mass 2 kg is dropped from a height of 1 m. Its kinetic energy as it touches the ground is
а. 19.6 N
b. 19.6 J
c. 19.6 kg
d. 19.6 m
Transcribed Image Text:e What is the potential energy of the spring when it is stretched 0.200 m? a. 50 J с. 80J b. 70J d. 90 J 9. What is its potential energy when it is compressed 5.00 cm? а. 5 J с. О d. 10 J b. 7J 10. A 2 kg ball falls freely from a height of 3 m. What is its kinetic energy in joules when it hits the ground? а. 20.3 J с. 62.7 J b. 58.8 J d. 1000 J 11. The potential energy gained by a 50 000 kg train after climbing a 20 m hill is а. 1.0 х 10° kg b. 2.5 x 106 kg c. 5.0 x 106 kg d. 9.8 x 106 kg 12. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10 m/s? ) %3D a. 50 J c. 500 J b. 60 J d. 600 J 13. A 1 kg mass has a kinetic energy of 1 joule when its speed is a. 0.45 m/s b. 1 m/s с. 1.4 m/s d. 4.4 m/s 14. An object of mass 1 kg has potential energy of 1 joule relative to the ground when it is at a height of a. 0.102 m c. 9.8 m b. 1 m d. 32 m 15. A body of mass 2 kg is dropped from a height of 1 m. Its kinetic energy as it touches the ground is а. 19.6 N b. 19.6 J c. 19.6 kg d. 19.6 m
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