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In the diagram shown coefficient of fric...

In the diagram shown coefficient of friction between 2 kg block and 4 kg block is `mu =0.1 ` and between 4 kg and ground is `mu =0.2 ` then answer the following quwstions .(tis time)

At t=4 s, the friction between 4 kg block and ground will be

A

2 N towards right

B

4 N towards left

C

0 N

D

2 N towards left

Text Solution

Verified by Experts

The correct Answer is:
B
At t = 4 s F = 8 N, the system will not move and free body diagram is as under

Equilibrium of 2 kg gives T + 2 = 8 T = 6 N
Equilibrium of 4 kg gives `2 + f_(2) = T = 6` `:. F_(2) = 4N`
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