What is a force?
What is a load?
What is an Inclined Plane?
What is another name for an inclined plane?
Wheels and Axles
When we want to move a heavy object we have to use a lot of force because the object sliding on the ground creates a lot of friction.
Gravity also holds the object down to the earth.
You know what a wheel is. An axle is the bar that goes through the middle of the wheel letting it spin.
This gets the heavy object off the ground meaning less friction! so it is easier to move as less touches the ground.
Lets Review
What is a wheel?
What is an axle?
What makes it hard to move big objects (loads)?
Why do wheels and axles make it easier to move loads?
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