How does a lever make lifting easier?

A long handle can make a heavy object easier to lift. The handle does not make the object lighter. It changes how a push turns a rigid bar around a support called the pivot. A lever is this combination of a turning bar and a pivot.

The distance from the pivot matters. A push farther from the pivot has a greater turning effect than the same push close to it. In the pictured balance, a 60-newton load acts 1 distance unit from the pivot. A 20-newton effort acts 3 units away. The two turning effects balance: 60 × 1 equals 20 × 3. These values assume that the forces act at right angles to the lever.

There is a trade-off. When the bar turns, its far end travels through a longer arc than a point near the pivot. The smaller effort therefore moves farther while the heavier load moves a shorter distance. A lever exchanges force for distance; it does not create energy.

That is why the position of a support and the length of a handle matter in lifting tools. Real levers also bend and lose some energy through friction. The simple balance describes a rigid lever with negligible losses, so it explains the advantage without specifying how much a real tool can safely carry.