A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is?

Net force acting on wood=1.5-0.6=0.9N

Mass of nail=3gm=0.003 kg

Using F=ma

a=F/m=0.9 / 0.003=300

Now given that,

 t=0.01 sec

Using v=u+at

0=u-300 x 0.01

u=3 m/s


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