What is a structure?
A group of elements that can support weight or load and project objects
Most structures have which 3 elements?
girders, pillars, and a load
Which shape makes for a very strong structure?
A triangle
Are levers simple or complex machines?
simple machines
Tell me one example of a class 1 lever.
pliers, scale, pin, clip, etc.
Tell me 1 example of a class 2 lever.
wheelbarrow, tweezers, bottle opener, etc.
Tell me one example of a class 3 lever.
a broom, stapler, fishing rod, etc.
Pulleys help us....
lift heavy objects more easily.
An inclined plane...
lets us move objects using less force.
The screw is..
an inclined plane wrapped around a cylinder.
If we join two inclined planes we get a...
wedge.
What are mechanical components?
Simple machines that transmit movement.
A crank is
a bent level that transmits its movement to an axle.
Gears are...
several cogs that are connected.
The 3 parts of a lever are..
force, pivot and load.
Force is...
push or a pull on an object
