Answer to Question #288094 in Mechanics | Relativity for Ttt

Question #288094

When talking a penalty kick, footballer applied a force of 30.0 N for a period of 0.05 s. If the mass of the ball is 0.075 kg, Calculate the speed with which the ball moves off.


1
Expert's answer
2022-01-17T09:59:05-0500

F=maF = ma

a=Fm=300.075=400ms2a = \frac{F}{m}= \frac{30}{0.075}=400\frac{m}{s^2}

v0=0v_0= 0

a=v1v0ta = \frac{v_1-v_0}{t}

v1=at=4000.05=20msv_1 = at= 400*0.05=20\frac{m}{s}

Answer: 20ms\text{Answer: }20\frac{m}{s}


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