# physics

A barefoot ﬁeld-goal kicker imparts a speed
of 44 m/s to a football initially at rest.
If the football has a mass of 0.49 kg and the
time of contact with the ball is 0.028 s, what
is the magnitude of the force exerted by the
ball on the kicker’s foot?

1. 👍 0
2. 👎 0
3. 👁 274
1. a = (V-V)/t = (44-0)/0.028 = 1571 m/s^2

F = m*a = 0.49 * 1571 = 770 N.

1. 👍 0
2. 👎 0

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