Problem: A 46 gram golf ball is shot from the tee at an angle of 25^o, ending up straight down the fairway 150 m away (not counting rolling).

a) What was its initial velocity?
b) With what force was the ball hit, if the collision time is 1.22 ms?

a) This part is a projectile motion problem:

Writing the components of the displacement equation...

The zero time is when the ball is hit; the y-component of the displacement is zero then. We're interested in the other time. Equating the two,

The initial velocity is

b) Using the impulse-momentum principle,

Since the last quantity in parentheses is a unit vector, the magnitude of the force is 1.65 kN.