1. The problem statement, all variables and given/known data A golf ball is struck by a golf club at 55 m/s at an angle of 28.0° above the horizontal. The mass of the ball is 45 grams and is in contact with the golf club for 15 ms. Calculate the average force exerted on the ball by the club. 2. Relevant equations pi + FΔt = pf p = mΔv a = Δv/t 3. The attempt at a solution I'm really confused because it doesn't seem like I have enough information to solve the problem. Don't I need to know the mass of the golf club?