Lesson
Motion
By Carone
Fitness
Motion
Motion
Motion is defined as any
movement or change of
position.
As your body moves, the
muscle and skeletal systems
adjust and compensate for
the movement in order to
handle the change.
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Motion
Motion
As we participate in various
activities, we learn how to
control our bodies to
compensate for the
movement of the other
players, the ball, or other
objects being used.
Motion
Motion
There are various ways the body
moves as it reacts to its surroundings.
Some of these motions are:
•
•
•
•
•
Spin
Rotation
Rebound
Speed
Levers
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Motion
Spin
A spin is a twirling motion where the
body or object turns around a central
axis.
Examples:
• A top spins around its center.
• A basketball player spins around
another player to avoid getting the
ball stolen.
Motion
Rotation
Rotation occurs when an object
moves around a central object.
Examples:
• The planets rotate around the sun.
• Soccer players rotate around the
ball, so they are all ready to have it
passed to them.
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Motion
Rebound
To rebound is to bounce or
spring back after coming into
contact with another object.
Examples:
• A basketball rebounds off the
backboard.
• A hockey puck rebounds off
the wall.
Motion
Speed
Speed measures how fast
something is done.
Examples:
• The speed of running is
faster than walking.
• A track runner attempts to
have greater speed than
the other runners.
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Motion
Levers
A lever is a simple machine used to
make a task easier.
The muscles and bones within the
body work together as a series of
different lever systems. This is done
to compensate for gravity or other
forces placed on the body.
Motion
Levers
There are three classes of lever systems,
and each is made up of three things:
Fulcrum–the pivot point on which the
lever moves
Resistance–the load that is to be moved
by the use of the lever
Effort–the force used to operate the lever
We will explore the three lever systems
and how they are each used in everyday
life.
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Motion
Class 1 Lever
A class 1 lever has the fulcrum in the
center of the lever with the resistance
on one end.
The effort is applied on the opposite
end by pushing the lever down. This
causes the resistance to be moved
upward.
Motion
Class 1 Lever
Class 1 lever examples:
• Hammer
claws
• Seesaw or
teeter-totter
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Motion
Class 2 Lever
A class 2 lever has the fulcrum at one
end with the resistance in the middle.
When the effort is applied to the end
opposite the fulcrum, the lever is able
to move the resistance upward.
Motion
Class 2 Lever
Class 2 lever examples:
• Wheelbarrow
• Can
opener
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Motion
Class 3 Lever
A class 3 lever has the fulcrum at one
end and the resistance at the opposite
end.
The effort is applied in the middle to
move the resistance.
The class 3 lever is the most common
type of lever within the human body.
Motion
Class 3 Lever
• Bicep Curl
Class 3 lever examples:
• Fishing Pole
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Motion
Levers
If there is a greater resistance, an
increased effort would be necessary
to move it. For example, if a heavier
person sits on a seesaw, more force
would have to be applied at the
opposite end to move the seesaw.
The faster the effort is applied, the
faster the resistance is moved. For
example, if a fisherman pulls rapidly
on the fishing rod, the end will move
faster than if it was pulled slowly.
Motion
Motion
We will be able to better understand
what the body is capable of as we
understand the motions of spin,
rotation, rebound, speed, and the
different lever systems. We will be
able to better control our bodies and
the world around us.
This can lead to increased success in
activity or sports as well as a higher
rate of safety in everyday life.
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Presented
By Carone
Fitness
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