If block is sliding down on a rough fixed inclined plane with constant velocity as shown in the ...

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If block is sliding down on a rough fixed inclined plane with constant velocity as shown in the figure
\( \mathrm{P} \) then net force acting on the wedge due to block

W is:-
(1) \( \frac{\mathrm{mg}}{\cos \theta} \)
(2) \( \mathrm{mg} \)
(3) \( m g \cos \theta \)
(4) None of these
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