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

A small bead of mass $M$ slides on a smooth wire that is bent in a circle of radius $R$. It is released at the top of the circular part of the wire (point A in the figure) with a negligibly small velocity. Find the height H where the bead will reverse direction.

A particle is moving in translatory motion. If momentum of the particle decreases by $10\%$, kinetic energy will decrease by

A particle of mass $ 100\,g $ is thrown vertically upwards with a speed of $5m/s $ . the work done by the force of gravity during the time the particle goes up is

A mass of $ 400\,g $ and a mass of $ 100\,g $ have same $ KE $ , then the ratio of their momentums will be