a bullet of mass 15g has a speed of 400m/s . what is its kinetic energy? if bullet strikes a thick target and is brought to rest in 2 cm , calculate the average net force acting on the bullet ?
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for the 1st q k.e =l2/2m
therefore l= linear momentum
l=mv
l=15/1000×400=6
then k.e=36/2 15×1000=1200
therefore l= linear momentum
l=mv
l=15/1000×400=6
then k.e=36/2 15×1000=1200
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