(1) A 47.0 g golf ball is driven from the tee with an initial speed of 60.0 m/s and rises to a height of 25.2 m.
(a) Neglect air resistance and determine the kinetic energy of the ball at its highest point.
(b) What is its speed when it is 7.0 m below its highest point?
(2) A projectile of mass 0.800 kg is shot straight up with an initial speed of 27.0 m/s.
(a) How high would it go if there were no air friction?
m
(b) If the projectile rises to a maximum height of only 21.2 m, determine the magnitude of the average force due to air resistance.
N