Machines
how many simple machines are there?
6
A force that moves an object
Work
A bar that pivots around a fulcrum
lever
Water bottle lid
screw
What are the different types of levers?
1st class
2nd class
3rd class
The fixed point that a lever pivots around is called the ____.
fulcrum
Work = force X ?
distance
A wheel with a groove for a rope that is used for lifting
pulley
steering wheel
In a first class lever, what is in the middle of the machine?
the fulcrum
What do we call multiple simple machines put together?
compound machine
If you exert a force of 20 Newtons to push a desk 10 meters, how much work do you do on the desk?
200 J
Two inclined planes together to make a point used for splitting
wedge
a slide
inclined plane
3rd class
An inclined plane wrapped around a cylinder is called what?
What is the formula for power?
Power = Work / time
A plane that has one end higher than the other
inclined plane
tweezers
lever
In a 3rd class lever, what is in the middle of the machine?
the input force
When you raise or lower a flag on a flagpole, you are using a (an) ____.
pulley
If a person does 6000 J of work in one minute, how much power does he have?
100 Watts
the assembly formed by two disks, or cylinders, of different diameters mounted so they rotate together around the same axis
Wheel and Axle
a can opener
compound
What type of lever is a crowbar?
first class