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A river of salty water is flowing with a velocity 2 m/sec. If the density of the water is 1.2 gm/c.c., then the kinetic energy of each of cubic metre of water is

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24 J

2.4 J

4.8 kJ

2.4 kJ

answer is D.

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Detailed Solution

KE = (1/2)mv² = (1/2) x 1 x 1.2 x 10³ x 4
KE = 2.4 kJ

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