Figuring out the efficiency of an inclined plane

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SUMMARY

Samantha utilized a 4-meter inclined plane to lift a 225 kg motorcycle, requiring only 345 N of force to push it up the ramp. The calculated work output was 1350 J, while the work input was 1380 J, resulting in an efficiency of 97.8%. The mechanical advantage was determined to be 6.5 by dividing the weight of the motorcycle (2250 N) by the force applied (345 N). The calculations were verified using a gravitational constant of 10 m/s².

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  • Knowledge of gravitational force and its application in physics problems.
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simplekin
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Homework Statement


Rather than lifting a 225kg motorcycle 60cm on a truck, Samantha uses a 4m plank as an incline and only requires 345N to push up the ramp



Homework Equations





The Attempt at a Solution



To find work output, i did .6M X 2250N giving me 1350 J
To find work input, i did 345N X 4M giving me 1380J
I divided 1350J by 1380J giving me 97.8 % efficiency
For mechanical advantage i said 6.5, by dividing 2250N by 345N



Can someone correct this, or tell me if I got this right, thank you!
 
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Looks OK to me. (You are using a value of g = 10 m/s^2.)
 

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