High-speed stroboscopic photographs show that the head of a 208 g golf club is trav- eling at 27.9 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 20.1 m/s.
Find the speed of the golf ball immediately after impact.
Answer in units of m/s
Mv₁=mu+Mv₂
u = M(v₁-v₂)/m =
= 208(27.9-20.1)/45.9 =
=35.3 m/s