A body of mass 2kg moving on a horizonta...

A body of mass `2kg` moving on a horizontal surface with an initial velocity of `4 ms^(-1)` comes to rest after `2` second. If one wants to keep this body moving on the same surface with a velocity of `4 ms^(-1)` the force required is

Zero

2 N

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The correct Answer is:

`F=2xx(4)/(2)=4N`

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