Question

A bomb of mass 30kg at rest explodes into two pieces of masses 18kg and 12kg. The velocity of 18kg mass is 6m/s. What is the kinetic energy of the other mass?​

Answer 1

Answer:

Here, m

1

=18kg,m

2

=12kg,v

2

=6ms

−1

In accordance with conservation law of momentum

v

2

=

m

2

m

1

v

1

=

12

18×16

=9m/s

∴ KE of 12 kg mass piece

K

2

=

2

1

m

2

v

2

2

=

2

1

×12×(9)

2

=486J

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Answer 2

Explanation:

this is your answer