Power Point Fizik Form 4
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PhySIcs FoRm 4
To know the exactly definition of inertia.
To analyze the relationship between inertia and mass.
To understand the effects of inertia in daily life experience.
Learning Objectives
MENU Definition of inertia Relationship betwee
n inertia and mass. Applications of inerti
a Quiz
INERTIA. At glance!Click the video to play
Inertia
Magic or trick???
Vocabulary:Resist: Menentang/melawan
Definition Inertia is the property
of matter that cause it to resist any change in its motion or state of rest
Inertia
Inertia
How could this happen???
INERTIA makes the moving object continue to move at a constant speed in the same direction unless some external force changes the object’s motion
If the object is moving…
Inertia
It tends to stay in that position unless some force puts that object into motion
If an object is at rest…
Inertia
Inertia is not physical quantity and thus it does not have units
The property of inertia is found from the Newton’s first law of motion
Newton’s First Law of Motion
"An object at rest tends to stay at rest and an object in motion the same speed and in the same direction tends to stay in motion
with unless acted upon by an unbalanced force"
Inertia
Laziness!!!Hard working.
Inertia
MENU
RELATIONSHIP BETWEEN INERTIA AND
MASS
Constant wherever it is measuredBase quantityScalar quantityThe SI unit of mass is kilogram (kg)
Mass can influence the
effects of inertia.
An object with a
larger mass has a larger
inertia.
MENU
If the motorcycle were to abruptly stop, then the rider in motion would continue in motion. The rider would likely be propelled
from the motorcycle and be hurled into the air. Once they leave the motorcycle,
the rider becomes a projectile and continues in projectile-like motion. It is
because of inertia.
MENU
1. The looses head of a hammer To tighten the loose head of a hammer,
knock one end of the handle held vertically, on a hard surface.
The hammer head will continue on its downward motion
when the handle has been stopped, the top end of the handle is slotted deeper into the hammer head.
2. To dislodge sticking chili sauce • Chili sauce in a bottle is poured out by a quick downward
movement of the bottle followed by a sudden stop. • The sauce in the bottle moves with the bottle during the
downward movement. • When bottle is stopped, the inertia of the sauce causes it
to continue on its downward movement and thus the sauce is forced out of the bottle.
3. Passengers in a bus • Passenger in a bus will lurch backward when a
stationary bus starts to move with forward acceleration. • The passenger were originally stationary. • When the bus started to move forward with an
acceleration, the inertia in the passenger made them maintain their original position.
Applications of Inertia
MENU
Question 1
QUIZ
Question 2Question 3
MENU
ANSWER
When the cardboard covering the glass is pulled out quickly, what will
happens to the coin?
ANSWER
When the cardboard covering the. glass is pulled out quickly, the coin resting on the
cardboard drops into the glass
What will happen to the rest of the coins when
one of the coin is moved out quickly?
ANSWER
The inertia of the coins maintains it in its original
position (at horizontal/rest) even
when one of the coin is moved out quickly
When a student is riding a bicycle and
runs over a stone, he is thrown forward.
Why does this happen?ANSWER
The inertia of the student maintains his forward motion so that he is
thrown forward when his bicycle is momentarily stopped by the stone
MENU