Learn about Newton's First Law of Motion

1. 1

2. OBJECTIVES
By the end of this lesson student is able to:
 Explain what inertia is
 Relate mass and inertia
 Give example of situations involving inertia
 Suggest ways to reduce the negative
effects of inertia
2

3. IDEA OF INERTIA
3

4. The bus stop suddenly
The passenger jerk forward
4

5. The bus moves suddenly
The passenger jerk backward
5

6. A ladder is strapped to the top of a painting
truck. As the truck moves down the road, the
ladder moves with it. The ladder shares the
same state of motion as the truck. When the
truck stop suddenly, the ladder is more likely to
maintain its state of motion. Thus it jerk
forward. 6

7. STATE OF MOTION
7

8. DEFINITION OF INERTIA
(Newton's First Law of Motion)
An object at rest tends to stay at rest
and an object in motion tends to stay in
motion with the same speed and in the
same direction unless acted upon by an
unbalanced force
8

9. The resistance an object has to a
change in its state of motion
9

10. EVERYDAY APPLICATIONS
OF INERTIA
(NEWTON'S FIRST LAW)
10

11.  The head of a hammer can be
tightened onto the wooden handle by
banging the bottom of the handle
against a hard surface
 To dislodge ketchup from the bottom
of a ketchup bottle, it is often
turned upside down and thruster
downward at high speeds and then
abruptly halted.
11

12.  Blood rushes from your head to your
feet while quickly stopping when riding
on a descending elevator.
12

13. THE RELATIONSHIP BETWEEN
INERTIA AND MASS
13

14. What will happen to the pail that is full with
sand compared to the empty pail when it is
push by the student?
What will happen when the student tries to
stop the moving pail?
14

15. It is hard to moves the full pail of sand
compared to the empty pail
It is hard to stops the full pail of sand
compared to the empty pail
Conclusion:-
The massive object has the great inertia
compared to the light object
15

16. RELATIONSHIP BETWEEN
INERTIA AND MASS
The bigger the mass of an object the
greater the inertia of the object
16