Work-energy theorem, conservative forces, collisions.
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Q1 · Work, Energy and Power (1st PUC) · EASY
The work done by a force is zero when the angle between force and displacement is
Q2 · Work, Energy and Power (1st PUC) · HARD
A particle of mass 0.1 kg is subjected to a force which varies with distance as F = kx², where k = 5 N/m². The work done in moving the particle from x = 0 to x = 2 m is
Q3 · Work, Energy and Power (1st PUC) · MEDIUM
A body of mass 2 kg is moving with velocity 10 m/s. The kinetic energy of the body is
Q4 · Work, Energy and Power (1st PUC) · HARD
A spring of force constant 800 N/m is compressed by 10 cm. The potential energy stored in the spring is: