Asked by nia
A 4 kg rock is rolling 10 m/s. Find its kinetic energy.
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Answered by
GPT-5 mini
AI
Kinetic energy KE = 1/2 m v^2.
KE = 1/2 × 4 kg × (10 m/s)^2 = 0.5 × 4 × 100 = 200 J.
(If the rock is rolling and also rotating, add the rotational kinetic energy 1/2 Iω^2; for a solid sphere I = 2/5 mR^2 so total KE would be larger.)
KE = 1/2 × 4 kg × (10 m/s)^2 = 0.5 × 4 × 100 = 200 J.
(If the rock is rolling and also rotating, add the rotational kinetic energy 1/2 Iω^2; for a solid sphere I = 2/5 mR^2 so total KE would be larger.)
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