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An object of mass 5 kg falls from rest t...

An object of mass 5 kg falls from rest through a vertical distance of 20 m and reaches a velocity of 10 m/s. How much work is done by the push of the air on the object ? `(g=10m//s^(2)).`

A

350 J

B

750 J

C

200 J

D

300 J

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