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A bullet leaves a rifle with …

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A bullet leaves a rifle with a velocity of 200m/s and strike a wooden target up to 4cm.What velocity should it have to pierce the same block of wood up to 16cm?

Posted by Ashutosh Raj 6 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Tanisha Rawat 4 years ago

KE= work done mv^2/2= F *s m200*200/2= F*4/100 F/m= 200*200*100/8( the retardation produced in the wooden peg. Now to pierce 16 cm m*v^2/2= m*4000000/8 *16/100 v^2/2= 80000 v^2= 160000 v= 400 m/s

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