1. Crane - lever, gear or pulley?by

2. The question? The problem I am trying to solve :
What type of building device is a Crane?
Is it a:
Gear
Pulley
Lever?
Let me explain what each of these are.

3. Levers Levers have a handle and the balance point.
The handle of the lever is called the "arm”. The arm is the part that you push or pull on.
The "fulcrum" is the point on which the lever turns or balances on

4. Gears
Gears are used for transmitting power from one part of a machine to another.
On a pedal bike, when you rotate the pedals the power transfers through the gears to the wheels.

5. Pulley
Pulley is a collection of one or more wheels over which you loop a rope to make it easier to lift objects.
An example is a water well. In the olden days, they attached a rope to a bucket and looped through a wheel (lever). They dropped the bucket down a well and used the rope to pull the bucket full of water up.
The lever makes it easier to pull up the heavy bucket

6. Cranes Now that we know what Levers, Gears and Pulleys are.
Does a Crane use:
Levers
Gears
Pulleys?
Could a machine use one or more of the above?

7. Conclusion: Cranes use Gears and Pulleys!
Cranes use gears to extend the rope and pull it back.
Cranes are also pulleys because rope is looped through a wheel to help lift heavy items
Lets look at my homemade model