1
What happens when 2 or more pulleys are used together?
It multiplies the force to make it 2 times easier.
An inclined plane with a long surface with have a ________ angle of incline?
The job will be _____________.
small and easier
A wheel is really a kind of what?
lever
Name 2 wedges that exist in nature?
teeth,nails
What is force called
Effort
Machines with a few parts are called
simple machines
what a second class lever?
the load is located between the effort and the fulcrum
How come the use of the wheel as the best way to travel did not catch on quickly?
People needed to train horses to pull wagons and they had to build roads.
An inclined plane with a short surface will have a _______ angle of incline.
The job will be _______.
bigger and harder
Name 3 things a wedge can do?
Grate
Dig
Cut
Sharpen
What are the basic simple machines
Pulleys, levers, wedges, inclined planes, wheel and axle and screws
When are levers most often used
To lift and move loads
Name 2 materials that might be used to make an inclined plane
metal, wood and plastic
Give 4 examples of an inclined plane used on the job, in sports or everyday life.
Hills
ramps
bath tub
sink
What does it mean when a pulley has a mechanical advantage of 1?
You must apply the same force to the one end of the rope.
Effort being multiplied is called
Mechanical advantage
What does horizontal mean?
The flat base of a triangle. Left to right
what does vertical mean?
Distance from the base to the top. Up and down
Pulleys make it possible to _______ and _________ loads.
raise
lower
Where and for what would you find a pulley?
in a house the blind for a window
What does a lever move up and down on
Fulcrum
what is an inclined plane?
a plane inclined at an angle to the horizontal.
Mechanical efficiency of a centrifugal pump is the ratio of.
Energy available at the impeller to the energy supplied to the pump by the prime mover
Mechanical advantage =________.
Load/Effort
A screw is a tool that ________ things together.