Asked by Haneef

When taking a penalty kick a footballer applies a force of 30N for a period of 0.05s if the mass of the ball is 0.075kg, calculate the speed with the ball moves off.
Answered by Haneef
Answer
Answered by Anonymous
force = mass * change in velocity / change in time
so
force * change in time = mass * change in velocity
which by the way is change of momentum
so
30 N * 0.05 s = 0.075 kg * speed at end
solve for speed at end
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