A body of mass 10 kg is moving on a hori...

A body of mass 10 kg is moving on a horizonal surface be applying a force of 10 N in the forward direction. The body moves with a constant velocity of `0.2ms^(-1)`. Work done by the force of friction in the first 10 seconds is

`-20J`

10 J

20 J

`-5J`

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