An effort force of 60N is applied to rise a load 100N. If the load is carried

Question

through a distance of 20m and the effort moves through a distance of
40m using a lever, then,
a. What are AMA and VR of the machine
b. Calculate the Win and Wout
c. Find the amount of wasted energy
d. What is the efficiency of the machine

Answer 1

a. MA = L/E = 100/60 = 5/3.
VR = De/Dl = 40/20 = 2.

b. Wi = 60*40 =
Wo = 100*20 =

c. Wi-Wo =

d e = L/EVr = 100/(60*2) = 0.833 = 83.3 %.