Force - Force and Pressure - Chapter 11: CBSE Class 8 Science
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Here we discuss the topic as, Force form chapter 11 force and pressure of CBSE class 8 science.
Topics Covered in this video:
00:01 - What is Force?
00:30 - Push and Pull
03:01 - Unit of Force
07:55 - Effects of Force
First, we have to understand what is the force?
Force:
A push or pull on an object is called force.
We often see person lifting box, hitting a rock, pulling door, pushing another man, shutting the door, opening book, kicking the football, picking an object, sitting on a chair, sleeping on the lane.
These all give some kind of push or pull in motion where force, as well as pressure, acts.
We could even see when two bodies interact a force come to play and there could even be the change in the direction of motion.
Force and Pressure are the concepts acting simultaneously on the body in motion.
The force is nothing but the interaction between any two bodies or the push or pulls between them while the pressure tells how much is the push or pull the body experiences when force is applied over a particular area.
The Force formula is given by F = ma
Types of Forces
There are basically two types of force - Contact force and Non-contact force.
The forces that act on the bodies that are in physical contact are known as contact forces,
whereas the forces which act on bodies without being in any physical contact are Non-contact forces.
Effects of Force:
- Force can create motion.
- Force can stop the motion.
- Force can change the speed.
- Force can change the direction of motion.
- Force can change the shape of the object.
All the above-mentioned topics are described in an interactive and efficient manner so that the students could easily understand them.
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