A1 kg block is resting on a surface with coefficient of

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A1 kg block is resting on a surface with coefficient of friction μ = 0.1. A force of 0.8 N is applied to the block as shown in the figure. The friction force is

1. 0
2. 0.8 N
3. 0.98 N
4. 1.2 N

Correct Option: B

Limiting friction force between block and the surface is 0.98 N. But applied force is 0.8 N which is less than the limiting friction force. Therefore friction force for the given case is 0.8 N.