What is the kinetic energy of a 30 kg falling object when the object reaches a velocity of 20 m/s?
A. 6,000 J
B. 2,940 J
C. 5,880 J
D. 12,000 J
Answer : C. The kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s is 6,000 J.
k.e.=1/2 mv^2
=1/2*30*(20)^2
=15*400
=6000 kg m^2/s^2
=6000J
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Asked 3/17/2016 12:19:04 PM
Updated 159 days ago|1/13/2025 3:38:27 PM
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