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 bullet before hitting the wood is \(10\) \(m / s\) 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................. \(N\)

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Answer & Solution

Correct Answer

(C) \(10\)

Step-by-step Solution

Detailed explanation

\(v ^{2}= u ^{2}+2 as\)

\(0=(10)^{2}+2(- a )\left(\frac{1}{2}\right)\)

\(a =100 m / s ^{2}\)

\(F = ma =(0.1)(100)=10\, N\)

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