What is a Screw? Give two examples.

Hint: First we know a screw is a mechanism that converts rotational motion to linear motion, and a rotational force to a linear force. It is one of the six simple machines. It can be viewed as a narrow -inclined plane wrapped around a cylinder.

Complete answer:
A screw is a rod or nail with grooves on its circular curved surface. It is used to hold two objects firmly together and to lift things. In simple terms, a rotating inclined plane is called a screw. The grooved part of the screw is an inclined plane. The head of the screw has a groove for the tip of a screwdriver. So modern screws with their screwdrivers are a combination of two simple machines, the inclined plane and the lever. Ajar lid, a drill, spinning stool, clamp and spiral staircase are examples of the screw.

Additional information: A mechanical device that changes its position or magnitude by the moment of a few parts or no parts to achieve the required task is known as a simple machine. We have six different types of simple machines and each has brought an extreme and radical change. They are Inclined plane, Lever, Wedge, Wheel and axle, Pulley, Screw.

Note: A screw can amplify force means a small rotational force (torque) on the shaft can exert a large axial force on a load. The screws are easy to remove. They prevent moisture and are highly resistant to rust, etc.