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A 20 kg block is originally at rest on a...

A `20 kg` block is originally at rest on a horizontal surface for which the coefficient of friction is `0.6`. A horizontal force `F` is applied such that it varies with time as shown in the figure (a) & (b). If the speed of the block after `10 s` is `8v` then find `v`. ( Take `g=10m//s^(2)`)

Text Solution

Verified by Experts

The correct Answer is:
3
`F - mu mg =m (dV)/(dt)`
`muunderset(0)overset(v)(int)dV = underset(3)overset(10)(int)dt-mumgunderset(3)overset(10)(int)dt, rArr 20 V = 480 rArr V = 24`
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