Simple Machines 1
Work is measured in
Joules or J
What is force Measured in
Newtons
A Saw is really a kind of what?
Wheel and axle
An inclined plane with a long surface will have a SM______ angle of incline?
The job will be EAS_______.
small
easier
Name 3 wedges?
Ax
Knife
Sword
Door stop
Machines with a few parts are called
simple machines
What is an example of using 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 B______ angle of incline.
The job will be HA____.
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
What are pulleys most often used to do
To lift loads
Name an example of a wheel and axle
car wheel
motorized saw
ferris wheel
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?
Left to right
Name 2 materials that might be used to make an inclined plane
metal, wood and plastic
Pulleys make it possible to R_____E and L_______R loads.
raise
lower
Where and for what would you find a pulley?
In a house, the blinds for the window.
At a job site to lift heavy loads
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).
What does vertical mean?
Straight 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 HO______ things together.
holds