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 spring of force constant 500 N/m is compressed by 10 cm. What is the elastic potential energy stored in the spring?
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 body of mass 5 kg is raised to a height of 10 m. What is the potential energy gained? (g = 10 m/s²)