A block of unknown mass is at rest on a rough horizontal surface. A horizontal force \( \mathrm{...

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A block of unknown mass is at rest on a rough horizontal surface. A horizontal force \( \mathrm{F} \) is applied to the block. The graph in the figure shows the
\( P \) acceleration of the block w.r.t. the applied force.

W.
The mass of the block and coefficient of friction respectively, are \( \left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right) \)
(1) \( 2 \mathrm{~kg}, 0.1 \)
(2) \( 2 \mathrm{~kg}, 0.2 \)
(3) \( 1 \mathrm{~kg}, 0.1 \)
(4) \( 1 \mathrm{~kg}, 0.2 \)
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