Question

which example of levers would require the least amount of force to move the box? e. lever a f. lever b g. lever c h. they are all first class levers which require the same amount of force. q2

Explanation:

Step1: Recall lever - force principle

The mechanical advantage of a lever is given by the ratio of the effort arm length to the load arm length. The longer the effort arm relative to the load arm, the less force is required to move the load.

Step2: Analyze the levers

In Lever A, the effort arm is the longest among the three levers (distance from the fulcrum to the point of application of force) while the load (the box) is at the same relative position on all levers. So, Lever A has the greatest mechanical - advantage.

Answer:

E. Lever A