A man wants to move some heavy boxes up to the loft in his barn

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Homework Statement


A man wants to move some heavy boxes up to the loft in his barn. He uses a 2.25 Horsepower motor to pull the boxes a distance of 9.35 meters up a ramp inclined at an angle of 36.2 degrees with respect to horizontal. The boxes have a coefficient of kinetic friction .381 as they slide along the ramp.
a) What is the heaviest box the man can pull up the incline with his motor at a constant speed of 76.5 cm/s?
This question has more parts but this is the only part I have trouble with.

Homework Equations

The Attempt at a Solution


Table.PNG

I made the picture now i am lost on where to go to find the heaviest box.
 
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What have you learned about power? How about a relevant equation relating power to speed?
 
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kuruman said:
What have you learned about power? How about a relevant equation relating power to speed?
That helped a lot didnt know where my mind was... thank you!