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A bomb of mass 18 kg at rest explodes in...

A bomb of mass 18 kg at rest explodes into two pieces of masses 6 kg and 12 kg. The velocity of 12 kg mass is 4 m/s. The kinetic energy of the other mass is :

A

288 J

B

192 J

C

96 J

D

144 J

Text Solution

Verified by Experts

The correct Answer is:
b
`m_1v_1+m_2v_2=0`
`:. 6xxv_1+12xx4=0`
`v_1=(-48)/(6)= -8 m//s`
So K.E. of 6 kg mass is `E_1=1/2xx6xx64`
=192 J
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