Work-energy theorem, conservation of energy, power, collisions.
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Q1 · Work, Energy and Power · EASY
The kinetic energy of a body of mass 2 kg moving with velocity 5 m/s is:
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 · HARD
A machine does 2000 J of work in 5 seconds. The power developed by the machine is:
Q4 · Work, Energy and Power · MEDIUM
A body of mass 5 kg is raised to a height of 10 m. The potential energy gained is (g = 10 m/s²):