Question

the linear momentum of a body moving in one dimension varies with time according to the equation p=At+Bt²,where A and B are positive constants.Find out the net force acting on the body as a function of time.please explain with clear explanation..:-)

Answer 1

force=change in momentum
F=dp/dt
=d(At+Bt^2)/dt
=d(At)/dt + d(Bt^2)/dt
=A+2Bt

Answer 2

F= dp/dt  from newtons second law
F=d(At+t^2)/dt
  = A+2t N