Question

A golf ball with a mass of 0, 1 kg is driven from the tee. The golf ball experiences a force of 1000 N while in contact with the golf club and moves away from the golf club at 30 m·s-1. Calculate the time during which the golf club was in contact with the ball. 

Answer 1

The second Newton's law says

$$F=\frac{\Delta p}{\Delta t}$$

Thus, the time during which the golf club was in contact with the ball

$$\Delta t=\frac{m\Delta v}{F}=\frac{0.1*30}{1000}=0.003\:\rm s$$