emipoland
contestada

A 2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. Assuming that there is no air resistance, which statement is true?

A.The initial potential energy is less than the final kinetic energy

B.The mechanical energy is not conserved

C.The initial potential energy is greater than the final kinetic energy

D.The mechanical energy is conserved

Respuesta :

Here, Potential Energy at starting = mgh = 2 * 9.8 * 2.5 = 49 J

Kinetic Energy = 1/2 mv² = 1/2 * 2 * 7² = 49 J

In short, Your Answer would be Option D) The mechanical energy is conserved

Hope this helps!
blueaqua73
the correct option is D just trying to help :)

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