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A block of mass 15kg is placed on a long...

A block of mass 15kg is placed on a long trolley. The cofficient of fricition between the block and trolley is 0.18. The trolley accelerates from rest with `0.5m//s^(2)` for 20s. then what is the friction force:-

A

3.5N

B

133.3N

C

7.5N

D

N.O.T.

Text Solution

Verified by Experts

The correct Answer is:
C
Pseudo force `=15xx0.5=7.5N`
`f_("max")=15xx10xx0.18=27N`
`therefore f=7.5N`
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