Simple Machines

What is a simple machine?

• A simple machine is a term used to describe a complicated scientific theory.

• A simple machine is a complex system of gears and pulleys.

• A simple machine is a type of software used for basic calculations.

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

Name the six types of simple machines.

• lever, pulley, wheel and axle, inclined plane, wedge, screw

• gear, spring, magnet, ramp, nail, bolt

Explain how a lever works.

• A lever works by using a rigid bar or beam that is able to pivot on a fixed point called a fulcrum.

• A lever works by pushing down on both ends simultaneously.

• A lever works by using a flexible material instead of a rigid bar.

• A lever works by having the fulcrum at one end instead of in the middle.

Give an example of a pulley in everyday life.

• Elevator system

• Car engine

• Ceiling fan

• Bicycle chain

How does an inclined plane make work easier?

• An inclined plane increases the amount of force needed to lift an object.

• An inclined plane makes work easier by reducing the amount of force needed to lift an object.

• An inclined plane makes work easier by increasing the distance over which the force is applied.

• An inclined plane has no effect on the amount of force needed to lift an object.

Describe the function of a wheel and axle.

• The function of a wheel and axle is to generate electricity

• The function of a wheel and axle is to reduce friction and facilitate the movement of heavy objects by rotating around an axle.

• The function of a wheel and axle is to cook food

• The function of a wheel and axle is to fly in the air

What is a wedge and how is it used?

• A wedge is a type of shoe worn by athletes for running.

• A wedge is a type of fruit used for cooking.

• A wedge is used to separate objects or lift heavy objects by applying force to the narrow end.

• A wedge is a musical instrument played by blowing air into it.

Discuss the importance of a screw as a simple machine.

• A screw is important as a simple machine because it is not used in any practical applications.

• A screw is important as a simple machine because it can be easily replaced by other tools.

• A screw is important as a simple machine because it converts rotational motion into linear motion, allowing for the transmission of force over a distance.

• A screw is important as a simple machine because it does not provide any mechanical advantage.

Explain the concept of mechanical advantage in simple machines.

• Mechanical advantage is not affected by the input force in simple machines.

• Mechanical advantage is the same as friction in simple machines.

• Mechanical advantage is only applicable to complex machines.

• Mechanical advantage in simple machines is the ratio of the output force produced by the machine to the input force applied to it.

Provide an example of a compound machine and identify the simple machines within it.

• A toaster with a blender and a microwave

• A washing machine with a microwave and a car engine

• A car with a toaster and a blender

• A bicycle with simple machines like wheel and axle, lever, and pulley system.