Module 1 of first quarter Science 8

1. C
SCIENCE 8
MODULE 1 : FORCES

2. FORCE
•Force is a push or pull that acts upon
an object as a result of that objects
interactions with its surroundings.

3. Turn your module to page 5

4. DEFINITION OF TERMS
•Magnitude – represent the strength
of the force (Newton
or N)

5. DEFINITION OF TERMS
•Direction – points to where the
object goes
- the arrowhead indicate
the direction of the
force

6. DEFINITION OF TERMS
•Point of application – the location
where the force applied
•Line of action – straight line passing
through the point of application
and is parallel to the direction of
force

8. TWO TYPES OF
FORCES
1. CONTACT FORCES
2. NON-CONTACT FORCES

9. CONTACT FORCES
APPLIED FORCE
FRICTION
NORMAL
TENSION

10. NON-CONTACT
FORCES
Gravitational (Fg)
Magnetic

11. BALANCED FORCES
Forces that are equal in magnitude but
opposite direction
Do not cause a change in motion

13. UNBALANCED FORCES
 Forces that cause a change in motion
of an object
 two forces are unequal and opposite

15. NET FORCE or
RESULTANT FORCE
 the sum of all forces acting on an
object
When object is at rest, zero net force

16. NET FORCE or
RESULTANT FORCE
A net force exerted to an object at rest
may cause the object to move
Moving object will increase its velocity
when a net force of the same direction is
applied

17. NET FORCE or
RESULTANT FORCE
Net force in the opposite direction of
the object’s motion will reduce the
object’s velocity
When the net force acts sideways, the
direction of the object’s velocity changes

18. Turn your modules to
page 14