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  4. A hammer weighing 3 kg strikes the head of a nail with a speed of 2 ms -1 drives it by 1 cm into the wall. The impulse imparted to the wall is

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Q. A hammer weighing $3\, kg$ strikes the head of a nail with a speed of $2 \,ms ^{-1}$ drives it by $1\, cm$ into the wall. The impulse imparted to the wall is

Laws of Motion

Solution:

As we know, |impulse $|=|$ change in momentum $\mid$
$=\left| p _2- p _1\right| $
$=\left|0- mv _1\right|=|0-3 \times 2|=6\, Ns$