Wheels and Axles
What shape is a wheel ?
Round
A lever has _ important parts
3
A lever can let you change direction of a force or it can change the amount of ______________ needed.
Force
The wheel is attached to the ....
Axle
the item you are trying to lift is called the ....
load
You use a force to change the ________________ of an object.
Direction
In a wheel and axle, the wheel makes a large circular movement, and the axle makes a ____________ movement
Smaller
The wedge that the lever balances on is called the.....
fulcrum
This is a tool that makes work easier to do.
A Simple Machine
The wheel was invented how many years ago?
around 6000
What you need to make the lever work
Force
Using a machine allows us to use ____________ force to move something.
Less
The most common answer for something in real life involving wheels and axles on science detectives was :
Car
There are ___ classes of levers
3
A simple machine is a machine with _________________ moving parts.
Few or no