If a bullet of mass 5g moving withg a velocity of 100m/spenetrates a wooden block upto 6cm . Find the average force imposed .

If a bullet of mass 5g moving withg a velocity of 100m/spenetrates a w

1.	If a bullet of mass 5g moving withg a velocity of 100m/spenetrates a wooden block upto 6cm . Find the average force imposed .
Answer» SOLUTION :u=100 m/s , v=0 , ` s =6 XX 10^(-2) m , a=? ,v^(2)-u^(2)=2as` `0^(2)-(100)^(2) = 2 xx a xx 6 xx 100^(-2)` ` a=(-100 xx 100)/(2 xx 6 xx 10^(-2)), a=(-1)/(12) xx 10^(6) m//s` `F=ma = 5 xx 10^(-3) xx [(-1)/(12) xx 10^(-6)],F=(-5000)/(12)=-417 N` RETARDING force F= 417 N