Forces

Things with wheels roll easily. That is why wagons have wheels!

A ramp makes it easier to move heavy things up to a high place.

Wheels help things move more easily. Bikes, cars, and skateboards all have wheels.

When you roll a ball on carpet, it stops faster than on a smooth floor. That is friction!

Gravity keeps your feet on the ground. Without gravity, you would float!

When you stop pedaling a bike, it slowly stops because of friction.

Rubber balls bounce because they are stretchy and springy.

Spinning a top keeps it standing up. When it stops spinning, it falls over!

You can use a lever to lift heavy things. A seesaw is a type of lever!

When you drop something, it falls down. That is gravity at work!

Things slow down and stop because the ground rubs against them. That is friction!

A swing goes back and forth. You pump your legs to make it go higher!

A magnet can move a paper clip without touching it! That is magnetic force.

Boats float on water. They are shaped so they do not sink!

Toys with wheels are easier to move across the floor than toys without wheels.