MECHANICAL EFFICIENCY Home Page | Examples and Formulas | How to Improve your Mechanical Efficiency | Practice Questions | Practice Question Answers| Bibliography Mechanical Efficiency Formula and Example A 400N TV is needed to be moved up 5 metres, if a person moves the TV up a 10 metre ramp with the force of 250N what is the mechanical efficiency? The work input is 2500J and the work output is 2000J. 2000J divided by 2500J is 0.8. 0.8 times 100% is 80% therefore the mechanical efficiency is 80%. Wo = F x d Wo = 400N x 5m Wo = 2000J
Wi = F x d
Wi = 250N x 10m
Wi = 2500J
ME = (Wo/Wi) x 100%
ME = (2000J/2500J) x 100%
ME = 0.8 x 100%
ME = 80%
Home Page | Examples and Formulas | How to Improve your Mechanical Efficiency | Practice Questions | Practice Question Answers | Bibliography
Mechanical Efficiency Formula and Example
A 400N TV is needed to be moved up 5 metres, if a person moves the TV up a 10 metre ramp with the force of 250N what is the mechanical efficiency? The work input is 2500J and the work output is 2000J. 2000J divided by 2500J is 0.8. 0.8 times 100% is 80% therefore the mechanical efficiency is 80%.
Wo = F x d
Wo = 400N x 5m
Wo = 2000J
Wi = F x d
Wi = 250N x 10m
Wi = 2500J
ME = (Wo/Wi) x 100%
ME = (2000J/2500J) x 100%
ME = 0.8 x 100%
ME = 80%