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[" (a) "120^(@)" (b) "30^(@)" (c) "45^(@)" ,ut) "60^(@)],[" 20"m" .It momentarily comes to rest after attaining a "],[" height of "18m" .How mach energy is lost due to air "],[" friction "(g=10m/s^(2))" ? "]

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A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1) .It momentarily come to rest after attaining a height of 18 m . How much energy is lost due to air friction (g = 10 m//s^(-2))

A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1) . It momentarily comes to rest after attaining a height of 18 m . How much energy is lost due to air friction? (g = 10 ms^(-2))

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