1.

When a `2` kg car driven at `20 m//s` on a level road is suddenly put into netural gear (i.e. allowed to coast), the velocity decreases in the following manner: `V=20/(1+(t/20))m//s` Where t is time in sec. The deceleration of car at the instant its speed is `10 m//s` is.A. `5` wattB. `10` wattC. `15` watt`D. `20` watt

Answer» Correct Answer - `F=m(dV)/(dt)V`


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