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

Posted by Joshi Tha 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Ananya Shelar 3 years, 1 month ago

486 J Momentum is conserved just before and after the explosion of the bomb. Initial momentum is zero, so the resultant momentum of the exploded pieces should be zero. That is m1v1=m2v2 ⇒(18)(6)=12(v2) ⇒v2=9m/s ∴ the KE of 12kg mass=2112(92)=486J

2Thank You

Shubham Kumar 3 years, 1 month ago

12kg

3Thank You

Soumya Menon 3 years, 1 month ago

486joule

1Thank You

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