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.
F=maF = maF=ma
a=Fm=300.075=400ms2a = \frac{F}{m}= \frac{30}{0.075}=400\frac{m}{s^2}a=mF=0.07530=400s2m
v0=0v_0= 0v0=0
a=v1−v0ta = \frac{v_1-v_0}{t}a=tv1−v0
v1=at=400∗0.05=20msv_1 = at= 400*0.05=20\frac{m}{s}v1=at=400∗0.05=20sm
Answer: 20ms\text{Answer: }20\frac{m}{s}Answer: 20sm
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