Questions
A hammer of mass M strikes a nail of mass m with velocity of u m/s and drives it a metre into a fixed block of wood. The average resistance of wood to the penetration of nail is
detailed solution
Correct option is C
Applying the conservation of momentummu = (M + m)V0v0=Mm+MuThe acceleration A can be obtained using the formula v2=u2+2as. Here, we have0=v02−2Aa or A=v02/2a∴ A=Mm+M2u22aResistance = (M + m) A=M2(m+M)u22a.Talk to our academic expert!
Similar Questions
Statement I : The familiar equation mg = R for a body on a table is true only if the body is in equilibrium.
Statement II : The equality of mg and R has no connection with the third law.
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