A 19.5 kg block is dragged over a rough, horizontal surface by a constant force of 110 N acting at an angle of angle 31.1◦ above the horizontal. The block is displaced 6.74 m,and the coefficient of kinetic friction is 0.156.
What is the net work done on the block?
Answer in units of J.
1 answer
The work done is the component of the dragging force along the direction of motion, 110 cos 31.1, multiplied by 5.64 m. You do not need to know the friction coefficient. Work that does not get converted to frictional heat will become kinetic energy