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What happens to kinetic energy of a snowball as it rolls across the lawn and gains mass

User Vytaux
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2 Answers

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If you are not considering friction, the energy must be the same, therefore, kinetic energy will be constant.
User Smileek
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If an object whose mass is growing keeps the same, unchanged
kinetic energy, then its motion must slow down, because

Kinetic Energy = (1/2) (mass) (speed)² .
User Kambus
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