Simple Machines 1
Machines with many parts are called
Complex machines
What is force called
Effort
A wheel is really a kind of what?
lever
An inclined plane with a long surface will have a ________ angle of incline?
The job will be _____________.
small
easier
Name 3 wedges that exist in nature?
teeth
nails
claws
Machines with a few parts are called
simple machines
Draw or demonstrate a second class lever
Examples: Sweeping using a broom; standing on tip toes; flexing elbow or knee joints, etc.
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 _______.
big
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
Draw and label 1 example of a wheel and axle used in ancient times
Clay pot maker
Give 4 examples of an inclined plane used on the job, in sports or everyday life.
hills
ramps
escalators
stairs
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
Name 2 materials that might be used to make an inclined plane
metal, wood and plastic
Pulleys make it possible to _______ and _________ loads.
raise
lower
Where and for what would you find a pulley?
In a house, the blinds for the window.
What does a lever move up and down on
Fulcrum
Provide two examples of an inclined plane.
Examples: slide on playground; handicapped ramp; a ladder; a roller coaster ride (track).
Distance from the base to the top. Up and down
What happens when 2 or more pulleys are used together?
It multiplies the force to make it 2 times easier.
A screw is a tool that ________ things together.
holds