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Which has greater kinetic energy: a tennis ball that has a mass of 0.3kg travelling at 80m/s or a train that has a mass of 10000kg and is moving at 0.1m/s? tennis balltrain

Respuesta :

MathPhys

Answer:

Tennis ball

Explanation:

KE = ½ m v²

For the tennis ball:

KE = ½ (0.3 kg) (80 m/s)²

KE = 960 J

For the train:

KE = ½ (10,000 kg) (0.1 m/s)²

KE = 50 J

The tennis ball has more kinetic energy.

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