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UnnamedOne
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Homework Statement
Question:
Calculate the efficiency of a system that uses a falling mass to move a box along the desk.
Given (helps to see picture):
Weight of (sliding) box = 164g
Weight of (falling) mass = 200g
Distance of board (platform) = 88cm
Time (avg) = 6s
(anything missing? I can get it, just point it out [its a lab])
Homework Equations
Efficiency = (energy output/energy input) x 100%
The Attempt at a Solution
Ei = mad
= (0.2kg)(9.8kg/N)(0.88m)
= 1.7J
Eo= mgh
= (0.164kg)(9.8kg/N)(0.88m)
= 1.4J
E% = (Eo/Ei) x 100%
= (1.4J/1.7J) x 100%
= 82%
Picture I made:
w.w.w.i235.photobucket.com/albums/ee170/ShadowedIMG/Homework.png
(cant post links)
Any input to anything would be very helpful, and thanks for your time.