The slides are about Newton's first law. They explain the two part of newton's first law and the condition for object to obey it. They give some practical examples and applications of this law. It is also explained what happens when an object break a condition for obeying Newton's 1st law

1. NEWTON’S 1ST
LAW OF MOTION
Mashabela TS

2. SIR ISAAC
NEWTON.
ENGLISH PHYSICIST AND MATHEMATICIAN. HE
WAS THE CULMINATING FIGURE OF THE
SCIENTIFIC REVOLUTION OF THE 17TH CENTURY.

3. IT IS ALSO KNOWN
AS THE LAW OF
INERTIA
Newton’s 1st law of motion

4. WHAT DOES
NEWTON’S 1ST
LAW SAY
1. How many parts does it
have?
2. Real live scenarios where
this law is obeyed
3. How does it helps us?
NEWTON’S
1
ST
LAW
OF
MOTION
4

5. Newton’s 1st law of motion
state that
Every object will remain that is at rest
will remain at rest and every object that
is in motion will continue to move at
constant velocity, unless unbalanced
force act on it,
NFL
5

6. INERTIA
The tendency of an object to remain on it’s position (at
rest/stationary/not move), or to continue moving if it is in motion in a
straight line.
Newton’s first law acknowledges that every body has inertia and it
is consistent with the definition of inertia, hence it is called law of
inertia.
NEWTON’S FIRST LAW
6

7. NEWTON’S FIRST LAW
HAVE TWO PARTS
Part 1:It is about objects at rest
Part 2: It is about objects in motion

8. First part of the law
8
• The 1st part of the law state that
the object that are at rest will
continue to be at rest.
• This means objects that are not
moving or changing position will
remain where they are.
• This apple will remain where it (at
rest) is unless someone push it or
pull it.

9. First part of the law
•This ball will remain on the
ground(at rest) unless
someone kick it or the wind
move it. So kicking it or wind
moving it is an act of
unbalanced force
9

10. Second part of newton’s 2nd law
• Every object will continue to move at constant velocity,
unless unbalanced force act upon it.
• Constant velocity means unchanging speed and
direction
• If one of the two (speed or direction) changes, then
velocity will change.
10

11. Golden rule
• Newton’s first law can only be applied
when the forces are balanced, hence it
say unless unbalanced force at on it.
• This means when unbalanced force act on
it, it will no longer obey the first law, so it
will obey Newton’s 2nd law of motion which
is a topic for another day
11

12. PRACTICA
L
EXAMPLE
When a person is inside a car
that is moving at a certain
speed, when the car reduce
speed, the person goes
forward.
The reason the person
continue to move forward is
because he is obeying 2nd part
of Newton’s first law. He
continue to move at contant
velocity (speed).
NEWTON’S FIRST LAW 12

13. PRACTICAL EXAMPLE
When a person is inside a car that is moving at a certain
speed on a straight line, when the car turn or change
direction, the person goes to the initial direction.
The reason the person continue to move in the initial direction
is because he is obeying 2nd part of Newton’s first law. He
continue to move at contant velocity (direction).

14. PRACTICAL APPLICATION
The seatbelt were
created to stop people
from being injured when
involved in heat on
collision or any accident
that will result in
obedience of newton’s
first law as shown.

15. 15
NEWTON’S
FIRST
LAW
OF
MOTION
THANK YOU
Mashabela TS
Mashabelats73@gmail.com

16. References
• Saboo, A. (2015). Newton's first law of_motion. Available from slideshare at
https://www.slideshare.net/anshumansaboo71/newtons-first-law-ofmotion-
autosaved
• Markledlee. (2015). This is high school level presentation over Newton’s first Law of
motion. Available from slideshare at
https://www.slideshare.net/markedlee/newtons-1st-law-54361182
• Ffila. (2009). Ppt Newtons First Law. Available from slideshare at
https://www.slideshare.net/ffiala/ppt-newtons-first-law
• Ammu. (2014). NWETON'S 1ST LAW AND INERTIA. Available from slideshare at
https://www.slideshare.net/AMMU99/newtons-law-and-inertia
• Willard. (2014). Speed and velocity practice. Available from slideshare at
https://www.slideshare.net/arsharp56/speed-and-velocity-practice
16
NEWTON’S
FIRST
LAW