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A block of mass 2kg is sliding on a smoo...

A block of mass 2kg is sliding on a smooth surface. At t=0, its speed is `v_(0)=2m//s`. At t=0, a time varying force starts acting on the block in the direction opposite to `v_(0)` if the speed of object is `(38)/(N)m//s` at t=10s. Find the value of N

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Area=mv`-mv_(0)`
`-42=2(v-2)`
-21=v-2
`thereforev=-19m//s`
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