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Hey!
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Hello everyone.
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My name is Mr.
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Yaro.
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And today we will meet
with six invisible friends.
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And this friends is actually everywhere.
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So and the name of this
friends is Simple machines.
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Simple machines is devices, which can help
us to change direction or amount of force,
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which we can use for move something.
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And now let me introduce all
simple machines, one by one.
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So first one is lever.
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So lever can be used
for measure something.
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For example, in scales.
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We can put one cargo and
another cargo in opposite side.
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We can check the weight.
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Or lever can be used for lift
something, something heavy.
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A good example of lever is scissors.
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Here we have two levers.
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The next one is wheels
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and axle.
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Wheels has a round shape and
axle can connect it together.
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So wheels can roll and
easily move the things.
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We can find wheels in the car, is the
bicycle, even in our chairs and tables.
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So wheels is very good
assistant for our life.
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The next one is pulley.
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Pulley can help us to lift things.
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Pulley contain wheel and rope.
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So with pulley we can lift, we can
easily lift, very heavy the things.
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One more simple machine is inclined plane.
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Inclined plane based on plane or
ramp with one side which is lifted.
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So inclined plane can help us
to move objects with less force.
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For example, like this
or to another direction.
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The next simple machine is wedge.
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Wedge used to put between
two things to separate them.
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The good example of
wedge is axe or knife.
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So with knife, we can easily cut our food
and separated to different small pieces.
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Because without wedge, if
you can use just our hands or
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fingers - it will be really hard.
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And the last simple machine is screw.
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Screw can help us and convert the
rotational motion into linear motion.
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Screws is a very good friend
if you want to connect something
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together and hold it for a long time.
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So all these simple machines can
help us to build a very complex
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and complicated mechanisms.
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And we can find these simple
machines everywhere: inside our
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car, rocket and maybe spaceship.
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So see you next time.
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Bye-bye.
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