A golf ball of mass 50 g is at rest on a tee. Then a golf club strikes it, providing the ball with an initial speed of 102 m/ The club and ball were in contact for 0.81 ms. What is the average force that the club exerted on the ball?

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.