In the diagram shown above, Joe must lift a 100-pound box using a lever. How many pounds of force must he apply to the left side of the lever to lift the box? (The product of the weight of the box times the distance of the box from the pivot point must be equal to the product of the required force times the distance from the force to the pivot point: w

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<img src='https://www.fatskills.com/images3/firefighter/cfa0f2fd1c1ccdeab8b2740681249e9e.gif' border='0' alt='0156-01.gif'/><br>In the diagram shown above, Joe must lift a 100-pound box using a lever. How many pounds of force must he apply to the left side of the lever to lift the box? (The product of the weight of the box times the distance of the box from the pivot point must be equal to the product of the required force times the distance from the force to the pivot point: <br><i>w </i>