Work-energy theorem, conservative forces, collisions.
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Q1 · Work, Energy and Power · EASY
A body of mass 4 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
Q2 · Work, Energy and Power · MEDIUM
A machine lifts a load of 500 kg to a height of 20 m in 25 seconds. What is the power developed by the machine? (Take g = 10 m/s²)