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A 400 kg moving object has a kinetic energy of 15,000 J. What is the speed of the object? A) 5.6 B) 8.7 C) 7.9
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6 votes
A 400 kg moving object has a kinetic energy of 15,000 J. What is the speed of the object?

A) 5.6
B) 8.7
C) 7.9

User Iobelix
by
7.9k points

1 Answer

9 votes
Answer: B, 8.7m/s

Explantion:
V² =2kE/m
v² = 30,000 J/ 400kg
V² = 75
√v² =√ 75
V= 8.7 m/s


User Ahmed Shaqanbi
by
8.9k points
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