List of top Physics Questions on work, energy and power asked in JCECE

An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy $ \frac{{{E}_{0}}}{4}. $ Its potential energy is

A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $ x $ is proportional to

An $ \alpha - $ particle of mass m suffers one dimensional elastic collision with a nucleus of unknown mass. After the collision the $ \alpha - $ particle is scattered directly backwards losing 75% of its kinetic energy. The mass of the unknown nucleus is: