Questions
A block of mass 15 kg rests on a rough horizontal surface having coefficient of friction 0.6 between the block and the surface. A machine, delivering a constant power of 900 watt starts moving the block on the surface. Then maximum velocity of the block is
detailed solution
Correct option is D
Velocity of the block gradually increases and finally it becomes constant. Vmax and at that time the entire power output of the machine is used by the block in overcoming the friction. ∴ μmg.Vmax=P⇒ Vmax=Pμmg=9000.6×15×10m/s=10 ms-1Talk to our academic expert!
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