Work done by constant and variable forces, kinetic and potential energy, work-energy theorem, conservation of mechanical energy, collisions.
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Q1 · Work, Energy and Power · HARD
A particle of mass m is dropped from height h. What is its speed when it has fallen through a distance h/2?
Q2 · Work, Energy and Power · EASY
The work done by a force is zero when the angle between force and displacement is:
Q3 · Work, Energy and Power · MEDIUM
A spring of force constant 500 N/m is compressed by 10 cm. The potential energy stored in the spring is:
Q4 · Work, Energy and Power · EASY
A body of mass 2 kg is moving with velocity 10 m/s. What is its kinetic energy?