Faman(complex and simple machines) By:grade4red:)

What is simple and complex machine? :)😃

( By :Faman Grade4 red)
 Simple Machine: Any of various devices that function in a manner basic to any machine, such as a lever, pulley, wedge, screw, or inclined plane. Complex Machine: A device consisting of two or more simple machines working together.  :) 😃😃😃

Complex machines are also called compound machine. Two or more simple machines work together to form a complex machine. Compound machines can do more difficult jobs than simple machines alone. Examples of complex machines are bicycle, wheel barrow, crane, car jack, lawn mover etc. :0😃😃

A complex machine is also known as a compound machine, which consist of two or more simple machines, such as levers, wedges, pulleys, screws, wheel and axle and inclined planes. Some examples of complex machines are cars, bicycles, can openers, a wheelbarrow, scissors and a stapler.

Uses of simple machines:

• Inclined Plane: A plane surface inclined at less than a right angle to a horizontal surface, used to roll or slide a load up or down.
• Wedge: A piece of wood or metal shaped like a triangle with a thin edge. A wedge is driven or forced between objects to split, lift, or make them stronger.
• Screw: A metal device that fastens. You push a screw into a surface by turning it while pressing down on the head.
• Lever: A basic tool used to lift something or open something by lifting it out.
• Pulley: A simple machine that is used for lifting. A pulley is a wheel or set of wheels that a rope or chain is pulled over.
• Wheel and Axle: A machine consisting of a cylindrical drum to which a wheel concentric with and larger than the drum is fastened, so that as an attached rope unwinds from the wheel, another rope is wound onto the drum, exerting an increased force.

Some compound machines

scissor:A pair of scissors is a prominent example of complex machines. It is made up of two simple machines, namely a wedge and a lever. The blades of the scissors are wedge-shaped, whereas the handles of the scissors act as the first-class lever.

Wheelbarrow:A wheelbarrow is a combination of three simple machines, namely, an inclined plane, a wheel and axle combination, and a lever. The container of the wheelbarrow is an inclined plane that helps store the load easily. The handles of the wheelbarrow act as levers, allowing the user to lift the load easily. The wheel attached to the base of the wheelbarrow is the wheel and axle arrangement that helps the machine move from one place to another with ease.

canopener:A can opener comprises four simple machines, namely, lever, gear, wheel and axle, and wedge. The arms of the can opener act as two levers that help to grip and open the can. The cutter attached to the mouth of the opener is a wedge that helps the machine pierce right through the metallic body of the can. The round part attached to the opener is the gear that rotates and helps the user hold the can still. The rotating handle is the wheel and axle simple machine that supplies energy to the gear and the wedge.

Stapler:A stapler is a complex machine that is made up of two simple machines, namely, a lever and a wedge. The punching mechanism of the stapler acts as the second-class lever, whereas the stapler pins act as the wedges. When the user applies push force to the lever of the stapler, the wedge-shaped stapler pin pierces through the papers, thereby simplifying the task of attaching two papers together.

References:

https://www.pdesas.org/ContentWeb/Content/Content/2736/Web-based%20Resource