A complex machine.
A train is not a simple machine.
A fulcrum is a part of a simple machine, the lever. Without the fulcrum what is left of the simple machine can no longer increase the applied force and is no longer a simple machine.
yes a door knod is a simple machine
A spade is a simple mechanical (tool) machine.
Shear
a WEDGE!
wedges
how are beavers simple mashines
Simple Gears are machine elements that transmit motions by means of successfully engaging teeth.
Lever
It is a wedge.
If you think about this, you can figure it out. What shape is a shark's tooth? It's a triangle, right? What machine is a triangle shape? The only simple machine that looks like a triangle is a wedge.
Axes, forks, nails, your teeth, knives and many more.
They would use the teeth of buffalo.
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.
Simple Gears are machine elements that transmit motions by means of successfully engaging teeth.