Work, Simple Machines, and Mechanical Advantage

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it acts, measured in joules (J).

Front

What is a simple machine?

Back

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

Front

What is mechanical advantage (MA)?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied, indicating how much a machine multiplies force.

Front

How does an inclined plane reduce the effort needed to lift an object?

Back

An inclined plane allows a load to be lifted over a longer distance at a smaller height, reducing the force needed to lift the object.

Front

What is the formula for calculating mechanical advantage of an inclined plane?

Back

MA = Length of incline / Height of incline.

Front

What is the role of a fulcrum in a lever?

Back

The fulcrum is the pivot point around which a lever rotates, allowing the lever to amplify the input force.

Front

What are the three classes of levers?

Back

1st Class: Fulcrum between input and output forces (e.g., seesaw). 2nd Class: Output force between input force and fulcrum (e.g., wheelbarrow). 3rd Class: Input force between output force and fulcrum (e.g., tweezers).

Front

What is the difference between input force and output force?

Back

Input force is the force applied to a machine, while output force is the force exerted by the machine.

Front

How does increasing the slope of an inclined plane affect mechanical advantage?

Back

Increasing the slope of an inclined plane increases the mechanical advantage, making it easier to lift the load.

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 easier movement of loads.