Question

Why do we use simple machines? What exactly do they do?

Answer 1

Simple Machines:

There are six different simple machines. They are the lever, pulley, wheel and axle, inclined plane, screw, and wedge. Simple machines can be used alone or combined with other simple machines to make a complex machine.

Answer and Explanation:

• We use simple machines to make our work easier.
• Simple machines do this by multiplying force using leverage.
• Simple machines exert a force on a load in order to do work.

For example,

if you wanted to move a rock, by using a simple machine such as a lever, the force you exert is multiplied by the lever, so you can exert less force to do the same amount of work.

Answer 2

Working of Simple Machines

Simple machines make work (moving objects) much easier to do.

Making the work easier is called having a mechanical advantage.

A mechanical advantage is when you need less force to do the same amount of work because a simple machine is used to increase and change the direction of the applied force.

Purpose of Simple Machines

• A simple machine is a mechanical device that changes the direction or magnitude of a force.

• In general, they can be defined as the simplest mechanisms that use mechanical advantage to multiply force.

Importance of Simple Machines

Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities.

Examples of Simple Machines

Simple machines that are widely used include :-

• Wheel
• Axle
• Pulley
• Inclined Plane
• Screw
• Wedge
• Lever.

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