A body of mass 4 kg moving with velocity 12 m/s collides with another body of mass 6 kg at rest. If two bodies stick together after collision, then the loss of kinetic energy of system is
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a
Zero
b
288 J
c
172.8 J
d
144 J
answer is C.
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Detailed Solution
Loss in K.E. =m1m22m1+m2u1−u22=4×62×10×(12−0)2=172.8J