When taking a penalty kick, a footballer applies a force ...
When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. if the mass of the ball is 0.075kg, calculate the speed with which the ball moves off.
4.50ms-1
11.25ms-1
20.00ms-1
45.00ms-1
Correct answer is C
F = m(v−u)T
30 = 0.075(v−0)0.05
v = 20ms-1
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