law of inertia
TRANSCRIPT
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INERTIA
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To explain the role of inertia in different situations;
To determine the motion of the passenger inside the vehicles; and
To state inertia in your own words.
Objectives
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The property of a body that resists changes in a body’s condition of rest or of motion with constant velocity.
The tendency of an object to persist in its state of rest or in uniform motion in a straight line.
What is inertia?
Who have an idea of what is inertia?
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GALILEO GALILEI
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Newton’s First Law of Motion
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According to Newton's first law...
An object at rest will remain at rest unless acted on by a force. An
object in motion continues in motion with the same speed and
in the same direction unless acted upon by a force. This law is often
called "the law of inertia".
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What does this mean?
This means that there is a natural
tendency of objects to keep on doing
what they're doing. All objects resist changes in their state of motion.
Example:
Water
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An object at rest will remain at rest.
An object in motion will remain in motion.
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This law is the same reason why you should always wear your seatbelt.
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The mass measures the inertia in our body.
“The more inertia a body has, the more difficult it is to start
moving. It will also be more difficult to stop the body if it is
originally in motion.”
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Inertia is proportional to mass. Big masses resist changing their motion more than smaller masses.
A lot of inertia! The large train resists
changing its motion.
Very little inertia. The small baby carriage
has very little resistance to changes
in motion.
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A passenger sitting in the rear of a bus claims that he was injured when the driver slammed on the brakes, causing a suitcase at the
front to come flying towards him. If you were the judge in this case, what disposition would you make
and why?
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Ariel is a good racer of both the car and the single motor. He is planning to join the national
competition for each event. The problem is- both events have
the same schedule. If you were Ariel, which competition would
you choose? Justify your answer.
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