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A 6 kg blocks is kept over a rough surfa...

A `6 kg` blocks is kept over a rough surface with coefficients of friction `mu_(s)=0.6` and `mu_(k)=0.4` as shown in figure. A time varying force `F=4t` ( `F` in newton and `t` in second) is applied on the block as shown. Find the acceleration of block at `t=5 sec`. ( Taking `g=10 m//s^(2)`)

Text Solution

Verified by Experts

The correct Answer is:
0
Block will start when `4t=mu_(s)mg`
So, `t=mu_(s)=(mg)/(4)rArrt=(0.6xx6xx10)/(4)9s`
So, at `t=5 sec` block will be stationary
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