a bullet of mass 0.05kg is fired from a rifle with a velocity of 800m/s After passing through a wall of thickness 1m it's velocity reduces to 200m/s find the resistive force of the wall?
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Explanation:
KE before collision = 4000J
KE after collision = 1000J
ΔKE =3000J= Work
work. =F *S
3000 =F*1
3000 N=F
resistive force is=3000
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