Minimum Horsepower for Dragging a Box at a Given Speed

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To determine the minimum horsepower required to drag a 310 kg box at 1.2 m/s on a level floor with a coefficient of friction of 0.45, the frictional force (Ff) was calculated to be 1367 N. The participant initially struggled with understanding the force exerted by the motor, mistakenly considering additional forces. After clarification, they realized the only force needed was the frictional force, leading to the correct application of the power formula. The conversion from watts to horsepower was also highlighted as a necessary step. Ultimately, the participant successfully solved the problem.
engineer2010
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Quick help with Power problem!

Homework Statement


What is the minimum horse power a motor must have to be able to drag a 310 kg box along a level floor at a speed of 1.2 m/s if the coefficient of friction is .45


Homework Equations


fg=mg - - - > (c of f) (fn)= Ff
P = Fv



The Attempt at a Solution



I found Ff to be 1367 N but I am unsure of how to find the force with the motor is putting on the box.. I know that the box is not acclerating. so i tried going -1367 +F= 0 and the putting that in the power formula but that did not give me the correct answer
 
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Are you remembering to convert it from watts to horsepower?
 
ok i got it thanks.. i was thinking that there was another force in addition to the 1367. but i figured it out.
 

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