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In Ques 1 the force of dynamic friction ...

In Ques 1 the force of dynamic friction is.

A

`5N`

B

`3N`

C

`lt5N`

D

`gt5N`

Text Solution

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The correct Answer is:
c
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A block moving on a horizontal surface with velocity 20 ms^(-1) comes to rest because of surface friction over a distance of 40 m. Taking g = 10 ms^(-2) , the coefficient of dynamic friction is :

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