Determines whether an
object moves moves and
also direction
If force is in same
direction, then the force
gets added
If forces are in
opposite direction, they
combine by subtraction
Newton
Strength of a force is measured
in SI Unit called Newton
Was named after
Sir Isaac Newton
Balanced Force
The motion of the
object is not
changed
Net force is zero because
equal forces are exerted in
opposite directions
Unbalanced Force
It can cause an object to start,
stop or change direction of an
object in motion
It can result in a net force
and cause change in an
object's motion
Force is push or pull
exerted upon an object
Force is described by its
strength and which
direction it acts
The formula to find
force=mass*acceleration
Friction
The force that two surfaces
exert on each other when
they rub against each other
Strength of force of friction
depends on how hard
surfaces press against each
other and the type of
surface involved
Rough surface would
result in more friction
Static Friction: Static friction is the friction that exists
between a stationary object and the surface on which
it's resting.
Sliding Friction: Sliding friction results when an
object slides across a surface.
Rolling Friction: A Rolling friction is a resistive force that
opposes the rolling motion of an object. Rolling friction
occurs when a round object rolls around a surface.
Fluid Friction: Fluid friction is the friction between a solid
object as it moves through a liquid or a gas
Gravity
Universal Gravitation states that force
of gravity acts between all objects in
the universe
A force
that
pulls
objects
towards
each
other
Mass and distance affect gravity
Mass is measure of
amount of matter in an
object. Its SI unit is
kilogram.
Weight is a measure of the gravitational force
exerted on an object. It is also force of gravity on a
person or object at the surface of a planet.
In Free Fall, the force of gravity
is unbalanced, so the object
accelertes
Air Resistance is a force that is caused by air. The
force acts in the opposite direction to an object
moving through the air. It is a type of fluid friction
Terminal velocity is the greatest
velocity a falling object reaches and is
reached when the force of air
resistance equals the weight of the
object
Projectile motion is a form of motion in which an object or particle is
thrown near the earth's surface, and it moves along a curved path under
the action of gravity only. The only force of significance that acts on the
object is gravity, which acts downward to cause a downward acceleration
Laws Of Motion
First Law: An object at rest stays at rest and an
object in motion stays in motion with the same
speed and in the same direction unless acted
upon by an unbalanced force
Second Law: The acceleration of an object as
produced by a net force is directly proportional to
the magnitude of the net force, in the same
direction as the net force, and inversely
proportional to the mass of the object.
Third Law: For every action, there is an equal and
opposite reaction. The statement means that in every
interaction, there is a pair of forces acting on the two
interacting objects.