Normal -
force that is
perpendicular
to the surface that
an object contacts.
Friction - force when two surfaces
rub over one another.
Tension-
force in a rope
or string when
it is stretched.
Present when two solid
surfaces slide along each other.
Upthrust - upwards force for
object placed in fluid.
Drag -
'frictional force'
between
object and air
Weight - force of gravity acting on object.
Forces acted on an object, all the forces can be added and represented as a single force, net force – resultant force.
Eg: Rocket launch
Every action has an equal
and opposite reaction.
They act on different objects
They are equal in magnitude
They are opposite in direction
They are forces of the same type
F=ma
Unbalanced force on a body.
(causes acceleration)
Force & Motion
Application
The skier
Friction
Static friction
Applies when two surfaces are at rest with respect to each other (such as a book sitting on a table)
Kinetic friction
Act on the opposite direction of the object's velocity
it depends on : 1. normal force between two surface. 2. the nature of two sliding surface (coefficient of static friction)
Free body diagram
Inclines
Tension
FT
Types of Force
Newton's Law of Motion
3rd Law
2nd Law
1st Law
Inertia
An object at rest will stay at rest,
an object in motion will stay in
motion at constant velocity,
unless acted upon by unbalanced force.
Force
Vector
magnitude
direction
Push or pull
