A body of mass 1 kg of thrown upwards with a velocity 20 m/s. It momenetarily comes to rest after attaining a height of 18m. How much energy is lost due to air friction ? (g=10m/s2)
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The velocity of body of mass 10 gram increases from 4 m per second at a m per second when a force act on it for 2 seconds what is the momentum before the ac
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