Wheel and Axle

Which is a characteristic of simple machines?

• They run on electricity.

• They take a long time to make.

• They have few or no moving parts.

• They are not very large

What will happen if you push or pull a small object?

• The object will float.

• The object will move.

• The object will not move.

• The object will disappear.

Which one uses wheels and axles?

• pencil sharpner

• Pencil

• computer

• Door

Which is not a type of simple machine?

• Screw

• Pulley

• Wheel and axle

• car

A wheel always has to be _____

• round

• hard

• thick

• greasy

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field.

• A banker counts money

• A mother pushes a stroller up a ramp into a building

• A girl eats a sandwich

Why do we not just remove the wheel and turn the axle?

• Without the wheel, the axle is useless.

• Turning the axle directly requires too much effort.

• The axle can not turn on its own.

• The wheel balances the axle.

What object uses wheels and axles but also helps us exercise?

• wagon

• car

• bicycle

• record player

The transfer of energy that occurs when a force makes an object move is known as _____.

• effort

• knetic

• work

• potential

What is a wheel and axle?

• Flat surface that is higher at one end.

• A simple machine that moves or turns objects.

• Made from two or more simple machines.

• Uses a wheel and rope to lift a load.