How Much Work Does a Mover Do to Push a Refrigerator Up a Ramp?

AI Thread Summary
The discussion revolves around calculating the work done by a mover using a dolly to push a refrigerator up a ramp. The refrigerator weighs 110 kg, and the ramp is 2.1 m long with a height of 0.42 m. The mover applies a constant force of 445 N while moving the dolly at a steady velocity. A participant initially miscalculated the distance by using the hypotenuse instead of the ramp's length, leading to an incorrect work value of 953.007 J. The correct calculation for work done should simply be the force multiplied by the ramp length, which is 445 N times 2.1 m.
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Homework Statement



A mover's dolly is used to deliver a refrigerator up a ramp into a house. The refrigerator has a mass of 110 kg. The ramp is 2.1 m long and rises 0.42 m. THe mover pulls the dolly with constant velocity and with a steady force of 445 N up the ramp. The dolly and ramp constitute a machine. g=9.81/s^2

What work does the mover do?


The attempt at a solution

well i thought that this was a simple question. I used W=F*x using 445 N as F and 2.14 M as x which i got from using the pythagorean theorem. My final answer was 953.007 J but it was incorrect. Can someone help me understand what I'm doing wrong?
 
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You are told that the ramp is 2.1 m long. The ramp is not lying on the ground! The ramp is the hypotenuse of the right triangle. Looks to me like you should just have 445*2.1!
 

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