Football player at practice pushes a 200-pound blocking sled across the field at a constant speed. How much force must he apply to the sled? The best answer.
Coefficient of friction between the grass and the sled: 0.30
Kinetic friction between the grass and the sled: 0.30 * 200 = 60 N
Force required to overcome kinetic friction: 60 N
Total force applied to the sled: 60 N + 200 N = 260 N