Question

kinetic energy of a particle moving in a straight line varies with time as k =4t2 . the force acting on the particle

Answer 1

K.E = 1/2 mv² = 2k•E/V² F = m×a a = V/t F = mv/t F = 2•K•E / V² × V / t F = 2• K•E/ Vt F =k/v