You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. The ball had kinetic energy. How do you calculate that?

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05-12-2017
Physics

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You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. The ball had kinetic energy. How do you calculate that?

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AL2006 AL2006 · Answer 1 · 2017-12-05T05:47:11+01:00

Your best bet is to use the formula that describes the kinetic energy
of any moving object:

Kinetic Energy = (1/2) x (mass) x (speed-SQUARED)

In this question,
mass = 2.1 kg
speed = 30 m/s
speed² = 900 m²/s²

I have overwhelming confidence that you can take it
and finish it up from this point.