Force and Pressure Class 8 PPT

 Page 1


FORCE & MOTION FORCE & MOTION
Class-8
Page 2


FORCE & MOTION FORCE & MOTION
Class-8
Examples:
Pulling a drawer open or pushing it closed
requires applying a force.
Kicking a ball involves applying a force.
Riding a bicycle involves pushing the pedals,
applying force.
Force is a pull or push exerted on an object.
a.
b.
c.
What is Force?
Page 3


FORCE & MOTION FORCE & MOTION
Class-8
Examples:
Pulling a drawer open or pushing it closed
requires applying a force.
Kicking a ball involves applying a force.
Riding a bicycle involves pushing the pedals,
applying force.
Force is a pull or push exerted on an object.
a.
b.
c.
What is Force?
Examples:
To open a drawer, you need to
pull it; the drawer won't open
without this interaction.
To kick a ball, you must make
contact with it for the force to be
applied.
To apply a force to an object, there must
be an interaction between the object
and the source of force.
a.
b.
Forces are due to Interaction
Page 4


FORCE & MOTION FORCE & MOTION
Class-8
Examples:
Pulling a drawer open or pushing it closed
requires applying a force.
Kicking a ball involves applying a force.
Riding a bicycle involves pushing the pedals,
applying force.
Force is a pull or push exerted on an object.
a.
b.
c.
What is Force?
Examples:
To open a drawer, you need to
pull it; the drawer won't open
without this interaction.
To kick a ball, you must make
contact with it for the force to be
applied.
To apply a force to an object, there must
be an interaction between the object
and the source of force.
a.
b.
Forces are due to Interaction
Magnitude of Force: The measure of the
amount of strength of a force is called the
magnitude of force. Magnitude quantifies
the strength or amount of force applied.
Multiple Forces:
Forces can be applied to an object in
the same direction, and their
magnitudes add up.
Forces can also be applied in opposite
directions, and their magnitudes
subtract.
Exploring Forces
Page 5


FORCE & MOTION FORCE & MOTION
Class-8
Examples:
Pulling a drawer open or pushing it closed
requires applying a force.
Kicking a ball involves applying a force.
Riding a bicycle involves pushing the pedals,
applying force.
Force is a pull or push exerted on an object.
a.
b.
c.
What is Force?
Examples:
To open a drawer, you need to
pull it; the drawer won't open
without this interaction.
To kick a ball, you must make
contact with it for the force to be
applied.
To apply a force to an object, there must
be an interaction between the object
and the source of force.
a.
b.
Forces are due to Interaction
Magnitude of Force: The measure of the
amount of strength of a force is called the
magnitude of force. Magnitude quantifies
the strength or amount of force applied.
Multiple Forces:
Forces can be applied to an object in
the same direction, and their
magnitudes add up.
Forces can also be applied in opposite
directions, and their magnitudes
subtract.
Exploring Forces
When multiple forces are applied in the same direction, the total force is the
sum of their magnitudes.
Example: Pushing a car with more than one person makes it easier because the
magnitudes of their forces are added together.
When forces are applied in opposite directions, the total effective force is the
difference between the magnitudes of the opposing forces.
Example:
If two people apply equal forces in opposite directions, the net force is zero, and
the object doesn't move.
If one person applies 4 units of force in one direction, and another applies 6
units in the opposite direction, the net force is 2 units, and the object moves in
the direction of the larger force.
Forces Applied in the Same Direction:
Forces Applied in Opposite Direction:
Exploring Forces