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A golfer, driving a golf ball off the tee, gives the ball a velocity of +40 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 4.05E-3s.
(a) What is the change in momentum of the ball?

(b) Determine the average force applied to the ball by the club.

This is really a too simple problem.

change of momentum= mass(change in velocity).

average force=changemomentum/timeimpact

for part a i got change in momentum right which was 1.8 then when i divided that by 4.05E-3 i got 4.44E-4 and it was marked wrong

I used the same equation as you did for average force, but when I divided change in momentum by time of impact I got 444.

averageforce=changemomentum/timeimpact
=(1.80)/(4.05*10^3)
= 444.4

3

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