A block of mass 2.0 kg is pulled up on a smooth incline of angle 30º with the horizontal. If the block moves with 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?
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Resolving the forces parallel to incline.
.
.
The velocity after 4 seconds 
at.
Power delivered by force at 
Force 
velocity
The displacement during 4 sec
Work done in 
Average power delivered
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