A stationary object explodes into two fragments of masses 2 kg and 4 kg. Just after the explosion, velocity of the smaller fragment is found to be 8 m/s. Then kinetic energy of the larger fragment just after explosion is

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64 Joule

24 Joule

32 Joule

48 Joule

answer is C.

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Detailed Solution

(3)Conserving linear momentum,4 × v=2 ×8 ⇒ v=4 m/s.∴ Kinetic energy of 4kg mass = 12 × 4× 42J=32 Joule.

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