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A lever is a rigid straight or bent bar which is capable of rotating about a fixed axis. The position of the axis of rotation is called the fulcrum.

Mechanical Advantage of a Lever
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Inclined Plane We have seen people using an inclined plane for loading lorries (Figure 6.5). A force which is much smaller than the weight of the object is used. In this case, the MA is always greater than 1.
Description: 63834.png (in an ideal case without friction),

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Figure 6.5

where W is the weight of the object, h is the height of the lorry, P is the force applied in the direction indicated to move the object from the bottom to the top of the plank and L is the length of the plank over which the object is moved.

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