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A 30kg block rests on a rough horizontal...

A `30kg` block rests on a rough horizontal surface A force of `200N` is applied on the block The block acquires a speed of `4m//s` starting from rest in `2s` What is the value of coefficient of friction ? .

A

`10 //sqrt( 3)`

B

` sqrt( 3) //10`

C

`0.47`

D

0.185

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