The ideal mechanical advantage of a lever (IMA) is given by:

Where:
Le = Effort of the arm
Lr = Resistance arm.
Therefore, we can increase the force adventage by increasing the effort arm or reducing the load arm
Answer:
a. Make the effort length longer.
C
Unbalanced causes something to move because the net force is greater than zero
The answer is kilometers.
2/5 = .4
.4*100= 40%
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