If reaction is R and coefficient of friction is , what is work done against friction in moving a body by distance d ?

Step-by-step solution

The force of kinetic friction f_k acting on a body is given by the product of the coefficient of kinetic friction and the normal reaction force R . f_k = R The work done W against friction when moving a body by a distance d is defined as the product of the frictional force and the displacement, since the frictional force acts in the direction opposite to the displacement. W = f_k d Substituting the expression for f_k into the work formula: W = ( R) d = Rd Answer: Rd