The potential energy of a catapult was completely converted into kinetic energy by releasing a small stone with a mass of 20 grams. The velocity of the stone when it reached the target was 15.0 meters/second. What was the value of the kinetic energy of the stone when it reached the target?

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24 February, 15:49

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Thumper · Answer 1

1,000 grams = 1 kilogram

20 grams = 0.02 kilogram

Kinetic energy = (1/2) (mass) x (speed) ²

(1/2) (0.02) x (15) ² =

(0.01) x (225) = 2.25 joules