Net Work & Kinetic Energy Video Lessons

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Problem: Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of A. less than 100 J.B. 100 J.C. more than 100 J. 

FREE Expert Solution

Kinetic energy:

K=12mv2

Kinetic energy is dependent only on the mass and the velocity of the object.

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Problem Details

Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of 

A. less than 100 J.

B. 100 J.

C. more than 100 J. 

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