2. FORCE
-is a push or pull upon an object
- any influence that causes an
object to undergo a certain change,
either concerning its movement or
direction

3. NONCONTACT
FORCES are not in contact with
- the objects
each other.
GRAVIT
Y

4. CONTACT FORCES
- the objects have to be in contact
with each other.
Force between
road and the tires
of a car

5. KINDS
OF
FORCES

8. Gravitational
Force attraction, or pull between
- It is an
objects.
- It affects
anything that
has mass.

9.  Dependence
on Mass
 Dependence
on Distance

10.  Dependence
on Mass
More massive
planet =
more/large weight
Less massive
planet =
less/small weight

11.  Dependence
on Distance
nearer distance =
greater
gravitational force
farther distance =
lesser gravitational
force

12. Electromagnetic Force
- It is associated
with electrical
charge and
magnetism.

13. Electromagnetic Force
- It causes the interaction
between electrically charged
particles;
- the areas in which this happens
are called electromagnetic
fields.

17. Weak Force
- It is actually stronger than the
gravitational force.
- It is active only at distances less
-18
than 10 .
Strong Force
- It acts only on hadrons and keeps
them tightly packed within the
nucleus.

18. Frictional Force
- It is the resistive force that occurs
when two surfaces contact each
other.

20. Tension Force
- It is the force that is transmitted
through a string, rope, cable or wire
when it is pulled tight by forces acting
from opposite ends.

21. Normal Force
- It is the support force exerted upon
an object that is in contact with
another stable object. For example, if
a book is resting upon a surface, then
the surface is exerting an upward
force upon the book in order to
support the weight of the book.

22. Applied Force
- It is a force that is applied to an
object by a person or another object.
- If a person is pushing a desk across
the room, then there is an applied
force acting upon the object. The
applied force is the force exerted on
the desk by the person.