A simple machine uses energy from...
Animals
People or animals
Electricity
Archimedes invented simple machines with...
CATAPULT, MIRRORS, SCREW and LEVER
A complex machine has...
Many parts
3 parts
1-2 parts
A simple machine has...
2-4 parts
many parts
1 or 2 parts
A wheel and axle and pulleys make it...
MORE DIFFICULT TO LIFT OR LOWER HEAVY OBJECTS
EFFORTLESS
EASIER TO LIFT OR LOWER HEAVY OBJECTS
Say the parts of a pulley
WHEEL, AXLE, GROOVE and ROPE
it's the simplest machine: it only has 1 part.
INCLINED PLANE
It's the point where the lever turns.
FULCRUM or PIVOT POINT
A lever is...
A flexible bar with a fulcreus
A bar
A rigid bar with a fulcrum
What's an INCLINED PLANE?
It's a ramp used to LIFT and LOWER objects
The types of simple machines are...
Levers, wheel and axle and pulleys, and inclined planes
It's the force exerted by the object.
LOAD
The longer the ramp...
the less inclined it is.
A complex machine uses energy from...
Electricity or combustion
Electricity
Animals or people
It's the force applied by the person.
EFFORT
What are the types of levers?
1- Fulcrum in the middle 2- Load in the middle 3- Effort in the middle