A bullet of mass 0 . 1   kg is fired on a wooden block to pierce through it, but it stops after moving…

A bullet of mass 0.1 kg is fired on a wooden block to pierce through it, but it stops after moving a distance of 50 cm into it. If the velocity of the bullet before hitting the wood is 10 m s-1 and, it slows down with uniform deceleration, then the magnitude of effective retarding force on the bullet is x N. The value of x to the nearest integer is,

Solution

v2=u2+2as0=(10)2+2(-a)12
a=100 m s-2
F=ma=(0.1)(100)=10 N

Asked in: JEE Main 2021 (18 Mar Shift 1)

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