A fireman of mass \( 60 \mathrm{~kg} \) slide down a pole. He is pressing the pole with a force ....

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A fireman of mass \( 60 \mathrm{~kg} \) slide down a pole. He is pressing the pole with a force of \( 600 \mathrm{~N} \). The
\( \mathrm{P} \)
coefficient of friction between the hands and the pole
W
is 0.5 , with what acceleration with the fireman slide down \( \left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right) \)
(1) \( 1 \mathrm{~m} / \mathrm{s}^{2} \)
(2) \( 2.5 \mathrm{~m} / \mathrm{s}^{2} \)
(3) \( 10 \mathrm{~m} / \mathrm{s}^{2} \)
(4) \( 5 \mathrm{~m} / \mathrm{s}^{2} \)


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