Simple Machines and Work Review

Front

What is a lever?

Back

A simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. Examples include seesaws, crowbars, and staplers.

Front

What is the purpose of a fulcrum in a lever?

Back

The fulcrum is the pivot point around which the lever rotates, allowing the lever to lift or move a load.

Front

How can you decrease the effort needed to lift an object with a lever?

Back

By moving the fulcrum closer to the object being lifted.

Front

What is work in physics?

Back

Work is done whenever a force moves an object a distance. It is calculated as Work = Force x Distance.

Front

What is a wheel and axle?

Back

A simple machine consisting of a larger wheel attached to a smaller axle, allowing for easier movement of loads.

Front

How does a larger diameter wheel affect effort in a wheel and axle?

Back

Using a larger diameter wheel decreases the amount of effort needed to move an object.

Front

What is a pulley?

Back

A simple machine that consists of a wheel on an axle or shaft designed to support movement and change the direction of force.

Front

How do pulleys help in lifting objects?

Back

Pulleys reduce the amount of effort needed to lift heavy objects by distributing the weight and changing the direction of the force applied.

Front

What is an example of a compound machine?

Back

A bicycle, which combines wheels, levers, and pulleys to function.

Front

What is friction?

Back

A force that opposes motion between two surfaces in contact, which can affect the efficiency of simple machines.