A block of mass \( m \) is being pulled up a rough incline by an agent delivering constant power...

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A block of mass \( m \) is being pulled up a rough incline by an agent delivering constant power \( P \). The coefficient of friction between the block and the incline is \( \mu \). The maximum speed of the block during the course of ascent is
(1) \( \frac{P}{m g \sin \theta+\mu m g \cos \theta} \)
(2) \( \frac{P}{m g \sin \theta-\mu m g \cos \theta} \)
(3) \( \frac{2 P}{m g \sin \theta-\mu m g \cos \theta} \)
(4) \( \frac{3 P}{m g \sin \theta-\mu m g \cos \theta} \)
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