A force \( F \) pushes a block weighing \( 10 \mathrm{~kg} \) again...

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A force \( F \) pushes a block weighing \( 10 \mathrm{~kg} \) against a vertical wall as shown in the figure.
\( \mathrm{P} \)
The coefficient of friction between the block
W and wall is \( 0.5 \). The minimum value of \( \mathrm{F} \) to start
the upward motion of block is \( \left[\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right] \)
(1) \( 100 \mathrm{~N} \)
(2) \( 500 \mathrm{~N} \)
(3) \( \frac{500}{3} \mathrm{~N} \)
(4) can't be determined
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