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A block of mas 2.0 kg is pulled up on a ...

A block of mas 2.0 kg is pulled up on a smooth incline of angle `30^0` with the horizontal. If the block moves wth an acceleration of `1.0 m/s^2`, find the power delivered by the pulling force at a time 4.0 s after the motion starts. What is the average power delivered during the 4.0 s after the motion starts?

A

12 W

B

24 W

C

36 W

D

48 W

Text Solution

Verified by Experts

The correct Answer is:
D

`F-20sin30^@=2a`
`F-10=2xx1impliesF=12N`
`v=u+at=0+1xx4=4(m)/(s)`
`P=Fv=12xx4=48W`
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