Explanation

• Sound travels through a physical medium, such as air, water, or solid objects.
• It is transmitted through the vibration of particles in the medium.

Explanation

A compound machine is a machine that is made up of two or more simple machines.

A bicycle, a crane, wheel borrow and scissors are examples of compound machines because they are made up of multiple simple machines, such as:

• Wheels and axles (simple machine: wheel)
• Pedals and levers (simple machine: lever)
• Gears and pulleys (simple machine: pulley)
• Inclined planes (simple machine: inclined plane)

Explanation

A screw is a simple machine that is an inclined plane wrapped around a cylinder. 

It is used to fasten objects together, and it is used in:

• Fastening parts together
• Holding things in place
• Providing a secure grip

Examples include:

• Wood screws (used in woodworking and construction)
• Machine screws (used in machinery and equipment)
• Self-tapping screws (used in plastic and metal)
• Bolts (used in heavy-duty applications)
• Lag screws (used in heavy construction)
• Deck screws (used in decking and outdoor construction)
• Drywall screws (used in drywall installation)
• Anchor screws (used in concrete and masonry)

Explanation

An inclined plane is a slanting surface connecting a lower level to a higher level.

It is a simple machine that helps to lift or move loads to a higher position, and is commonly used in:

• Ramps
• Staircases
• Slides
• Ski lifts
• Hilly roads

Explanation

An inclined plane is a slanting surface connecting a lower level to a higher level.

It is a simple machine that helps to lift or move loads to a higher position, and is commonly used in:

• Ramps
• Staircases
• Slides
• Ski lifts
• Hilly roads

Explanation

• A wheel with a rod, called an axle, through its center lifts or moves loads.
• Example: Screw driver, handle is wheel and its shaft is axle, a car wheel.

The wheel and axle simple machine is used in many applications, such as:

• Transportation (cars, bicycles, etc.)
• Lifting heavy loads (cranes, winches, etc.)
• Moving objects (wheelbarrows, shopping carts, etc.)

Explanation

• A wedge is an object with at least one slanting side ending in a sharp edge, which is used to cut or split material apart.
• Examples: Axes, knives, chisels, plough nall, sharpener, iron nails and pins (push pin).

Explanation

• A pulley system is commonly used to raise and lower flags.
• As it allows for a change in direction of the force and makes it easier to lift the flag to a higher position.

Explanation

• A lever is a stiff bar that rests on a support called a fulcrum, which lifts or moves loads.
• The fulcrum is the point where the lever pivots, and it can be used to change the direction of a force or to gain a mechanical advantage, making it easier to lift or move heavy loads.
• Examples: Hammer, crow bar, a pair of pilers and seesaw.

Explanation

• Lever, pulley, wedge, wheel, inclined plane, and screw are examples of simple machines.
• These are basic machines that change the direction or magnitude of a force, making it easier to lift, move, or apply force to an object.

There are six types of simple machines:

1. Inclined Plane
2. Lever
3. Wheel and Axle
4. Pulley
5. Wedge
6. Screw