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A 4 kg bowling ball rolls at a speed of 5 m/s on the roof of a building that is 30 meters tall. What is its kinetic energy?

A. 10 J
B. 50 J
C. 120 J
D. 1,176 J

Respuesta :

ans: B

Kinetic energy = [tex]\frac{1}{2} mv^{2}[/tex]

= [tex]\frac{1}{2} (4)(5^{2} )[/tex]

= 50J

ps. the height will only affect its potential energy, not kinetic.

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