Sagot :
Answer:
1.Wheel and axle
2.wedge
3lever
4.screw
5.pulley
Uses
1.
Wheel and axle, basic machine component for amplifying force. In its earliest form it was probably used for raising weights or water buckets from wells. Its principle of operation is demonstrated by the large and small gears attached to the same shaft, as shown at A in the illustration.
2.The wedge. A wedge is an object that tapers to a thin edge. Pushing the wedge in one direction creates a force in a sideways direction. It is usually made of metal or wood and is used for splitting, lifting, or tightening, as in securing a hammer head onto its handle.
3.When you use a lever, you move a smaller force a longer distance in order to lift a load a short distance. Examples of levers include a seesaw, pliers, crowbars, and tweezers. See the above pictures for examples of how a lever is used in a wheelbarrow and construction equipment.
4.
A screw can also act to hold things together in some cases. Some examples of the uses of a screw are in a jar lid, a drill, a bolt, a light bulb, faucets, bottle caps and ball point pens. Circular stairways are also a form of a screw. Another use of the screw is in a device known as a screw pump.
5.You pull on the other end. The pulley helps you to move the load or change direction of the force. Some examples of pulleys include cranes, flag poles, and window blinds.