Mass of a block is \( 20 \mathrm{~kg} \). A man of mass \( 60 \mathrm{~kg} \) raises it with con...

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Mass of a block is \( 20 \mathrm{~kg} \). A man of mass \( 60 \mathrm{~kg} \) raises it with constant velocity as shown in the figure.
\( \mathrm{P} \) Force exerted by man on the floor will be :-

W
\( -(1) 400 \mathrm{~N} \)
(2) \( 600 \mathrm{~N} \)
(3) \( 200 \mathrm{~N} \)
(4) None of the above
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