What constant force is needed to stop a bullet of mass 20 g in a distance of 50 cm if the bullet has speed of 200 m/s?
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v^2=u^2+2as
0-40000=-2×a×0.5
40000÷1=a
a=40000
f=ma
f=0.02×40000
f=800N
0-40000=-2×a×0.5
40000÷1=a
a=40000
f=ma
f=0.02×40000
f=800N
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