Figuring out the efficiency of an inclined plane

AI Thread Summary
The discussion focuses on calculating the efficiency of an inclined plane used to lift a 225kg motorcycle. The user calculated the work output as 1350 J and the work input as 1380 J, resulting in an efficiency of 97.8%. They also determined the mechanical advantage to be 6.5 by dividing the weight of the motorcycle by the force required to push it up the ramp. Participants confirm the calculations appear correct, using a gravitational constant of 10 m/s². The thread emphasizes understanding work input, output, and efficiency in inclined planes.
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 somone 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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