This presentation includes the three newton's laws of motion: law of inertia, law of acceleration, and law of interaction.

1. Duration: 120 min Senior High School Grades: 12 ABM, HUMSS,
STEM
Newton’s Laws of
Motion
Physics, Physical Science
Click to open in Lifeliqe
JOHNEL VILLANUEVA
ESPONILLA
INSTRUCTOR

2. NEWTON’S LAWS OF MOTION 15
min
Measure and calculate the magnitude
of frictional forces and Newton’s three
Laws of Motion
Relate the state of motion of an
object to the magnitudes of the
individual forces which act upon it
Relate the net force of an object to
the acceleration of the object
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

3. SCIENCE VOCABULARY 15
min
a tendency to do nothing or to remain
unchanged
push or pull; required to change an
object’s motion
show magnitude and direction
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
FORCE
VECTOR
INERTIA

4. FOUR FORCES KNOWN IN THE UNIVERSE 15
min
responsible for holding nucleus
together in the atom; strongest force
caused from electric and magnetic
interactions
weakest force; acts over a longest
distance
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
ELECTROMAGNETIC
GRAVITATION
STRONG NUCLEAR
responsible for radioactivity in atoms
WEAK NUCLEAR

5. TYPES OF FORCES 15
min
Exists when an object from the
external world touches a system and
exerts a force on it
An object can move without
something directly touching it.
CONTACT
FIELD
FRICTION TENSION
GRAVITATIONAL
ELECTRIC
MAGNETIC
APPLIEDSPRING

6. FORCE AND MASS 15
min
measurement of how difficult it is to
change the objects velocity
resistance to change in velocity
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
MASS INERTIA
So mass is a measurement of an
object’s inertia.

7. NEWTON’S LAWS 15
min
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
ISAAC NEWTON
(1643 – 1727)

8. NEWTON’S LAWS OF MOTION 15
min
For every action, there is an equal and
opposite reaction
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
Force is equal to mass times
acceleration
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
1ST LAW
2ND LAW
3RD LAW

9. 15
min
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
What does this mean?
It takes force to change the
motion of an object.

10. 15
min
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
What is meant by
unbalanced force?

11. 15
min
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
Real Life Examples ???

12. 15
min
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
a.k.a Law of Inertia
The more mass
an object has,
the more inertia
it has.
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

13. 15
min
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
More Real Life Examples ???
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

14. 15
min
An object in motion tends to stay in
motion and an object at rest tends to
stay at rest unless acted upon by an
unbalanced force.
NEWTON’S FIRST LAW
If objects in motion tend to stay
in motion, why don’t moving
objects keep moving forever?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

15. 15
min
CHECK POINT!
NEWTON’S FIRST LAW
What is the relationship between
mass and inertia?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
A force of gravity between the sun
and its planets holds the planets in
orbit around the sun. If that force of
gravity suddenly disappeared, in
what kind of path would the planets
move?

16. 15
min
CHECK POINT!
NEWTON’S FIRST LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
The Earth moves about 30 km/s
relative to the sun. But when you
jump upward in front of a wall, the
wall doesn’t slam into you at 30
km/s. Why?
Is inertia a force?

17. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
A measurement of hoe quickly an
object is changing speed.
A force can cause motion only if it met with an unbalanced force.
What causes an object to accelerate?
Forces can be balanced or unbalanced.
What is the status of forces?
The sum total and direction of all forces acting on the object.Depends on the net forceDepends on the net force
Net forces: ALWAYS cause
acceleration

18. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
Balanced forces cause no
acceleration.
BALANCED versus UNBALANCED
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

19. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
Unbalanced forces cause acceleration.
BALANCED versus UNBALANCED
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

20. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does F = ma mean?
Force is directly proportional to mass and acceleration.
Small Force
F
a
Small Acceleration=
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

21. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does F = ma mean?
Force is directly proportional to mass and acceleration.
Large Force
F
a
Large Acceleration=

22. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does F = ma mean?
Acceleration is inversely related to the mass of the object.
Small Mass
M
a
Large Acceleration=

23. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does F = ma mean?
Acceleration is inversely related to the mass of the object.
Large Mass
F
a
Small Acceleration=
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

24. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
If you double the mass, you double the force. If you
double the acceleration, you double the force.
4F
What if you double the mass and the acceleration?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR

25. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does F = ma say?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
F = ma basically means that the force of an object comes
from its mass and its acceleration.
Force is measure in
Newtons (N) = mass (kg) x acceleration (m/s/s)

26. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
What does it say about
HIGH MASS?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
What does it say about
LOW MASS?

27. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
How does weight tie in?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Force equals mass times acceleration.
Mass is the quantity of matter in an
object.
Weight is the force of gravity on an object.
If force is equal to mass x acceleration then, weight
is equal to mass x acceleration due to gravity

28. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
How to solve Newton Second Law?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Force equals mass times acceleration.
1. Draw a free body diagram
2. Break vectors into components if needed.
3. Find the NET force by adding and subtracting forces that are the same axis as the
acceleration.
4. Set net force equal to “ma” this is called writing an
EQUATION OF MOTION.

29. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
Sample Problem
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Force equals mass times acceleration.
A 50 N applied force drags an 8.16 kg log to the
right across a horizontal surface. What is the
acceleration of the log if the force of friction is
40.0 N?

30. 15
min
Force equals mass times acceleration.
NEWTON’S SECOND LAW
F = ma
Sample Problem
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Force equals mass times acceleration.
An elevator with a mass of
2,000 kg rises with an
acceleration of 1.0 m/s/s.
What is the tension in the
supporting cable?

31. 15
min
CHECK POINT!
NEWTON’S SECOND LAW
Suppose that the acceleration of an object is zero. Does
this mean that there are no forces acting on it?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
When a basketball player dribbles a ball, it falls to the
floor and bounces up. Is a force required to make it
bounce? Why?

32. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
What does this mean?
For every force acting on an object, there is an
equal force acting in the opposite direction.
There is a balanced force acting on an object.

33. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
What happens if you are standing on a skateboard or a
slippery floor and push against a wall?
Why does it hurt so much
when you stub your toe?

34. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
When you push on the wall,
the wall pushes on you.

35. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
ACTION FORCE
---one force
REACTION FORCE
---another force
Neither force exists without
the other.
They are equal in strength and
opposite in direction.

36. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
What are the action and
reaction forces?

37. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Identifying ACTION and REACTION pairs

38. 15
min
For every action, there is an equal and opposite reaction.
NEWTON’S THIRD LAW
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Action and Reaction on
Different Masses

39. 15
min
CHECK POINT!
NEWTON’S SECOND LAW
We know that Earth pulls on the moon. Does the moon
also pull on Earth? If so, which pull is stronger?
JOHNEL VILLANUEVA ESPONILLA
INSTRUCTOR
Suppose a friend who hears about Newton’s third law
says that you can’t move a football by kicking it because
the reaction force by the kicked ball would be equal and
opposite to your kicking force. The net force would be
zero, so no matter how hard you kick, the ball won’t
move! What do you say to your friend?

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