A particle falls from rest under gravity. Its potential energy with respect to the ground (PE) and its kinetic energy (KE) are plotted against time (t). Choose the correct graph.

Potential energy (PE_(n)) and kinetic energy (KE_(n)) of electron in nth orbit are related as

A particle is realesed from a height H from ground. At certain height its kinetic energy is three times its gravitational potential energy with respect to ground. Then choose the correct option(s). (Given 'g' is acceleration due to gravity is constant).

A particle is released from rest at origin.It moves under influence of potential energy U=(x^(2)-3x) ,the kinetic energy at x=2m is

A particle is performing linear S.H.M. at a point A, on the path, its potential energy is three times kinetic energy. At another point B on the same path, its kinetic energy is 3 times the potential energy. The ratio of the potential energy at A to its potential energy at B is

An alpha particle is accelerated from rest through a potential difference of 100 volt. Its final kinetic energy is

A particle is performing linear S.H.M. at a point A, on the path, its potential energy is three times kinetic energy. At another point B on the same path, its kinetic energy is 3 times the potential energy. The ratio of the kinetic energy at A to its kinetic at B is

A body is projected vertically up. At certain heighth above the ground, the ratio of its potential energy to the kinetic energy is 2:3. At what height above the ground, the ratio of its kinetic energy to the potential energy will be 2 : 3 ?

A particle is projected from the ground with a kinetic energy E at an angle of 60° with the horizontal. Its kinetic energy at the highest point of its motion will be

Calculate the kinetic energy and potential energy of electron in hydrogen atom in its ground state.