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An inclined plane is a flat surface that is
higher on one end. You can use this machine
to move an object to a lower or higher place.
Inclined planes make the work of moving things
easier. You would need less energy and force to
move objects with an inclined plane.
The longer the slope of the inclined plane
the easier it is to pull or push the heavy object
up or down the inclined plane.
Examples:
Ramp Slanted Road
Path up a Hill Slide
A lever is a board or bar that rests
on a turning point. This turning point is
called the fulcrum.
An object that a lever moves is called the
load. The closer the object is to the fulcrum,
the easier it is to move.
There are many different
kinds of levers. One of them is
like a see-saw. There is a load
on one end, and when the
person pushes one end down
the load on the other side will
move.
Hammer
Examples:
•A hammer is a lever when it is used to
pull a nail out of a piece of wood.
•Crow bars •Bottle openers •Seesaw
Crow bar
A wedge is a simple machine used to push two objects apart.
A wedge is made up of two inclined planes. These planes
meet and form a sharp edge. This edge can split things
apart.
Examples:
•Axes
•Knives
•Nails
•Door stopper
A screw is a simple machine that is made from another
simple machine. It is actually an inclined plane that
winds around itself.
A screw has ridges and is not smooth like a nail.
Some screws are used
to lower and raise
things. They are also
used to hold objects
together.
Examples:
•Spiral Staircase
•Jar Lids
•Key Rings •Clamps
•Stools
•Wrenches
•Light Bulbs
This simple machine is made up of a wheel and a
rope. The rope fits on the groove of the wheel.
One part of the rope is attached to the load.
When you pull on one side of the pulley, the wheel
turns and the load will move.
Pulleys let you move loads up, down, or sideways. Pulleys
are good for moving objects to hard to reach places. It
also makes the work of moving heavy loads a lot easier.
Examples:
•Flag Poles
•Crane
•Clothes Lines •Sailboat
•Window Blinds
The wheel and axle is another simple machine. The axle is a
rod that goes through the wheel. This lets the wheel turn. It is
easy to move things from place to place with wheels and axles.
Examples:
•Cars
•Roller Skates
•Door Knobs
•Wagons & Wheelbarrows
•Gears in Watches, Clocks, and Bicycles
1. Simple machines make work easier.
Click on the best answer
A. True
B. False
2. A fork is an example of a:
A. pulley.
B. wedge.
C. wheel and axle.
Click on the best answer
3. A pulley is made up of:
A. a ball and chain.
B. a rope and wheel.
Click on the best answer
4. A roller skate is an example of a:
Click on the best answer
A. wheel and axle
B. wedge
C. lever
5. This simple machine is made up of
two inclined planes. Click on the best answer
A. screw
B. wedge
C. pulley
6. The bottom of a light bulb would be
considered a: Click on the best answer
A. wedge.
B. screw.
C. lever.
7. The fulcrum is the turning point of a(n):
Click on the best answer
A. lever.
B. pulley.
C. inclined plane.
8. A ramp is an example of a(n):
A. pulley.
B. screw.
C. inclined plane.
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9. A screw is both a(n):
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A. wedge and lever.
B. lever and inclined plane.
C. pulley and inclined plane.
10. A seesaw on the playground is a(n):
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A. lever.
B. inclined plane.
C. pulley.
11. A wheel and axle can be used to:
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A. pull an object towards you.
B. help you travel around.
C. both (A) and (B).
D. neither (A) or (B).
12. You would use a pulley to:
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A. cut food.
B. hold pieces of wood together.
C. help guide the sail on a sailboat.
13. An object that a lever moves is called a:
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A. weight.
B. force.
C. load.
14. The shorter the slope of the inclined
plane the easier it is to pull or push an
object up or down the inclined plane.
Click on the best answer
A. True
B. False
15. You would use a lever to:
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A. pull a box up a ramp.
B. pull a weed out of a garden.
C. pull the flag up on the flagpole.
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Http://www.fi.edu/qa97/spotlight3/spotlight3.html
Http://www.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm
Http://www.henry.k12.ga.us/cur/simp-mach/default.htm
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