Question

A mover's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 115 kg. The ramp is $2.10 \mathrm{m}$ long and rises $0.850 \mathrm{m} .$ The mover pulls the dolly with a force of $496 \mathrm{N}$ up the ramp. The dolly and ramp constitute a machine. a. What work does the mover do? b. What is the work done on the refrigerator by the machine? c. What is the efficiency of the machine?

Name: a movers dolly is used to transport a refrigerator up a ramp into a house the refrigerator has a mass of 115 kg the ramp is 210 mathrmm long and rises 0850 mathrmm the mover pulls the dolly with a for
Uploaded: 2021-08-23T01:09:24-08:00
Duration: 2 min 36 s
Channel: Ayman Sherif
Description: a movers dolly is used to transport a refrigerator up a ramp into a house the refrigerator has a mass of 115 kg the ramp is 210 mathrmm long and rises 0850 mathrmm the mover pulls the dolly with a for

          A mover's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 115 kg. The ramp is $2.10 \mathrm{m}$ long and rises $0.850 \mathrm{m} .$ The mover pulls the dolly with a force of $496 \mathrm{N}$ up the ramp. The dolly and ramp constitute a machine.
a. What work does the mover do?
b. What is the work done on the refrigerator by the machine?
c. What is the efficiency of the machine?

Added by Justin W.

Physics Principle and Problems

Paul W. Zitzewitz, Todd George Elliott,… 1st Edition

Chapter 10

Instant Answer

Solved by Expert Ayman Sherif

08/23/2021

Step 1

10 m, and the angle between the force and the distance is 0 degrees (since the mover is pulling the dolly up the ramp). So, we have: Work = 496 N x 2.10 m x cos(0) Work = 496 N x 2.10 m x 1 Work = 1041.6 J So, the mover does 1041.6 Joules of work. b. Show more…

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A mover's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 115 kg. The ramp is $2.10 \mathrm{m}$ long and rises $0.850 \mathrm{m} .$ The mover pulls the dolly with a force of $496 \mathrm{N}$ up the ramp. The dolly and ramp constitute a machine. a. What work does the mover do? b. What is the work done on the refrigerator by the machine? c. What is the efficiency of the machine?