Simple Machines Concept Review

Front

What is a simple machine?

Back

A simple machine is a mechanical device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, and inclined planes.

Front

What is the ideal mechanical advantage (IMA)?

Back

The ideal mechanical advantage (IMA) is the ratio of the output force to the input force in an ideal situation, without considering friction.

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that rotates around a fixed point called the fulcrum.

Front

What are the three classes of levers?

Back

1. First Class: Fulcrum is between input and output forces (e.g., seesaw). 2. Second Class: Output force is between input force and fulcrum (e.g., wheelbarrow). 3. Third Class: Input force is between output force and fulcrum (e.g., baseball bat).

Front

What is the mechanical advantage of a lever when the input and output forces are equal distance from the fulcrum?

Back

The mechanical advantage is equal to 1.

Front

What is a wheel and axle?

Back

A wheel and axle is a simple machine consisting of a larger wheel attached to a smaller axle, allowing for the transfer of force and motion.

Front

How does the input force affect the wheel in a wheel and axle system?

Back

When the input force is applied to the axle, the wheel turns over a greater distance.

Front

What is a wedge?

Back

A wedge is a simple machine that consists of two inclined planes joined together, used to separate objects or hold them in place.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to help lift objects with less effort.

Front

What is a screw?

Back

A screw is a simple machine that consists of an inclined plane wrapped around a cylinder, used to hold objects together or lift materials.