A particle is executing SHM with amplitude A. At displacement `x=(-A/4)`, force acting on the particle is F, potential energy of the particle is U, velocity of particle is v and kinetic energy is K. Assuming potential energyh to be zero at mean position. At displacement x=A/2

Options

A. Force acting on the particle will be 2F
B. potential energy of the particle will be 4U.
C. velocity of particle must be `sqrt(4/5)`v
D. kinetic energy of particle will be 0.8 K

Answer

B, D