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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

`10/3`

B

`sqrt3/10`

C

0.47

D

0.184

Text Solution

Verified by Experts

The correct Answer is:
C
`a=v/t=4/2=2ms^(-2)`
`rArr F-f-ma`
or `200-muxx30xx10=30xx2`
`therefore mu = 0.47`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-FRICTION IN SOLID AND LIQUIDS-EXERCISE 1
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