Work, Power and EnergyHard
Question
A bullet of mass m moving with velocity v strikes a block of mass M at rest and gets embedded into it. The kinetic energy of the composite block will be :-
Options
A.
mv2 × 
mv2 × B.mv2 × 
mv2 × C.mv2 × 
mv2 × D.Mv2 × 
Mv2 × Solution
From momentum conservation law
mV = (M + m)V′
V′ =
so KE =
(M + m)V′2 = 
mv2 
mV = (M + m)V′
V′ =
so KE =
(M + m)V′2 = mv2 Create a free account to view solution
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