Machines (Energy + Work)

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads with less effort.

Front

What is a pulley?

Back

A pulley is a simple machine that uses a wheel and a rope to change the direction of a force, making it easier to lift heavy objects.

Front

What is a wedge?

Back

A wedge is a simple machine that is used to drive objects apart or to hold them together. It has a thick end and a thin edge.

Front

What is a screw?

Back

A screw is a simple machine that consists of a cylindrical shaft with a helical ridge (thread) wrapped around it. It is used to hold objects together or lift materials.

Front

What is an inclined plane?

Back

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

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. It measures how much a machine multiplies force.

Front

What is the function of a wheel and axle?

Back

A wheel and axle is a simple machine that consists of a larger wheel attached to a smaller axle. It is used to reduce friction and make it easier to move or lift loads.

Front

How does a lever work?

Back

A lever works by using the fulcrum to amplify the input force applied at one end, allowing a heavier load to be lifted at the other end.

Front

What is the purpose of a pulley system?

Back

A pulley system is used to lift heavy objects by changing the direction of the force applied, making it easier to lift the load.

Front

What is the difference between a fixed pulley and a movable pulley?

Back

A fixed pulley is anchored in place and changes the direction of the force, while a movable pulley moves with the load and reduces the amount of input force needed.