PowerPoint Presentation
Simple MachinesSOL 3.2By Ms. Weinberg
A. WeinbergSimple machines are tools used to make work
easier.
A. WeinbergYou have probably used some simple machines, but did
not realize that they were actually called simple machines!
A. WeinbergSimple machines do not make less work; they just make
it easier to do work.
It would be hard to cut this wood without the saw!A.
WeinbergThere are 6 different types of simple
machines:(1)lever(2)screw(3)pulley(4)wheel & axle(5)inclined
plane(6)wedgeA. Weinberg(1) LEVERA lever is a stiff bar that moves
about a fixed point (fulcrum).A lever is used to push, pull, or
lift things.
A. WeinbergA shovel is an example of a lever.
A seesaw is another example of a lever.
A. Weinberg(2) SCREWA screw is an inclined plane wrapped around
a cylinder or cone. A common use of the screw is to hold objects
together.
A. WeinbergA jar lid and a wood screw are examples of a
screw.
So far we have learned about 2 types of simple machines: levers
& screws. A. Weinberg(3) PULLEYA pulley is a wheel that has a
rope wrapped around it. Pulleys can be used to lift heavy objects
by changing the direction or amount of the force.
A. WeinbergA flagpole uses a pulley to raise the flag.
Now we have learned about 3 types of simple machines: levers,
screws, and pulleys..A. Weinberg(4) WHEEL & AXLEA wheel &
axle consists of a rod attached to a wheel. A wheel & axle
makes it easier to move or turn things.
A. WeinbergA bicycle wheel, roller skates, and a doorknob are
all examples of a wheel & axle.
We now know about 4 types of simple machines: levers, screws,
pulleys, and wheels & axles.
A. Weinberg(5) INCLINED PLANEAn inclined plane is a flat surface
that is raised so that one end is higher than the other.An inclined
plane helps move heavy objects up or down.
A. WeinbergA ramp is an example of an inclined plane.
Lets add inclined plane to our list of simple machines (along
with levers, screws, pulleys, and wheels & axles).A.
Weinberg(6) WEDGEA wedge is wide at one end and pointed at the
other to help cut or split other objects.
A. WeinbergExamples of wedges: a knife or an ax
A. WeinbergNow you know about the 6 types of simple machines:
(1) LEVER(2) SCREW(6) WEDGE(3) PULLEY(4) WHEEL & AXLE(5)
INCLINED PLANE
A. WeinbergThese simple machines make work easier!
A. WeinbergThe End!A. Weinberg
