18 Golfer & ball A golfer hits a golf ball, imparting to it an initial speed of 53 m/s directed 27' above the horizontal. Assuming that the
mass of the ball is 41 g and the club and the ball are in contact for 1.0 ms. Find
b) the magnitude of the average force, in Newtons, exerted on the ball by the club:

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?