1.
Mechanism to move or lift heavy things consisting of a suspended wheel, which rotates around an axis, with a channel or groove on its edge through which a rope or chain is passed
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2.
Slopes or inclined planes are diagonal surfaces on which objects can rest, slide, or roll up or down. Inclined planes are useful as they can reduce the amount of force required to move an object vertically.
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3.
A wedge is a triangular shaped tool and is a portable inclined plane, and one of the six classical simple machines. It can be used to separate two objects or parts of an object, lift an object, or hold an object in place
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4.
Simple machine that essentially consists of a bar that rests or can rotate on a point (support point or fulcrum) and is designed to overcome a force (resistance) by applying another force (power).
