Simple Machines Flashcard

Front

What is a lever?

Back

A lever is a simple machine that helps lift or move loads with less effort by using a fulcrum.

Front

How does a lever reduce the force needed to lift a load?

Back

A lever reduces the force needed by increasing the distance over which the force is applied.

Front

What is the purpose of a screw in simple machines?

Back

A screw is used to hold two objects together or to lift materials by converting rotational motion into linear motion.

Front

What simple machine is used to lift heavy objects by changing the direction of the force applied?

Back

A pulley.

Front

What is the role of friction in the efficiency of a machine?

Back

Friction can reduce the efficiency of a machine; reducing friction increases efficiency.

Front

Where should the fulcrum be placed to use the least amount of effort with a lever?

Back

The fulcrum should be placed closer to the load.

Front

What is an inclined plane?

Back

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

Front

Give an example of a wedge and its use.

Back

A wedge is a simple machine like a knife, used to split or cut objects.

Front

What is the wheel and axle?

Back

The wheel and axle is a simple machine that consists of a larger wheel attached to a smaller axle, allowing for easier movement.

Front

How does a pulley make work easier?

Back

A pulley changes the direction of the force needed to lift an object, making it easier to lift heavy loads.