A ramp that lowers the effort needed to move a heavy box is an example of which simple machine?

A ramp that lowers the effort needed to move a heavy box is an example of which simple machine?

• A. Inclined plane
• B. Lever
• C. Wedge
• D. Screw

Answer: (A)

A ramp uses an inclined plane to make moving a heavy box easier by spreading the effort over a longer distance. When you push along the ramp, you apply a smaller force parallel to the surface, and you move the box a longer distance, which means the work you do (ignoring friction) equals the weight multiplied by the height the box gains. In essence, the ramp reduces the required force by trading force for distance while keeping the total amount of work the same.

Other simple machines work differently: a lever changes force through a pivot point to lift loads, a wedge is two inclined planes back-to-back used for splitting or tightening, and a screw is an inclined plane wrapped around a cylinder that converts rotation into linear motion. Those don’t describe moving a heavy box up a slope with less force over a longer distance the way an inclined plane does.