When taking a penalty kick, a footballer applies a force of 30.0N for a period...

JAMB 1988

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.

A. 4.50ms^-1
B. 11.25ms^-1
C. 20.00ms^-1
D. 45.00ms^-1

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Correct Answer: Option C

Explanation

F = \(\frac{m(v - u)}{T}\)

30 = \(\frac{0.075(v - 0)}{0.05}\)

v = 20ms-1

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When taking a penalty kick, a footballer applies a force of 30.0N for a period...

Correct Answer: Option C

Explanation

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