- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
Force
Force-
- Force is an external effort in the form of push or pull.
- It is formed because of interaction of two bodies.
- It changes or tries to change speed/direction of a body.
- It stops or tries to stop a body to rest from motion also vice versa.
Force can be divided into
Contact force Non-Contact force
- The Force in which the body and the object are - The Force in which the body and the object are not in contact then it is called
in contact then it is contact force. Non-contact force.
Contact forces
Muscular force-
Friction-
Non-Contact forces
Magnetic force
Gravitational force
Electrostatic force
Forces can also be divided into
Balanced force Unbalanced force
-The force which cannot change the speed of an object is - The force which can change the speed of an object is unbalanced force.
balanced force.
-It is always 0(zero) - It is always non-zero.
Resultant force
If a single force applied on a body produces same acceleration as one or more forces then this force is called as Resultant force.
Units of force
SI unit of force is NEWTON it is donated by N .
CGS unit of force is DYNE .
Inertia-
The tendency of an object to continue in the form of rest,or motion ,or direction even if some external force is applied then it is called Inertia of rest,Inertia of direction respectively.
Newtons law on motion
1. "Every object in the universe will continue in the state of rest,in uniform motion or in a straight line until or unless some external force is applied"
This law tells us about force.
2. " Force is directly proportional to the rate of change of momentum"
This law gives us a formulae that is
F=ma
Force=mass x acceleration
3. "Every action has an equal and opposite reaction"
- Force is an external effort in the form of push or pull.
- It is formed because of interaction of two bodies.
- It changes or tries to change speed/direction of a body.
- It stops or tries to stop a body to rest from motion also vice versa.
Force can be divided into
Contact force Non-Contact force
- The Force in which the body and the object are - The Force in which the body and the object are not in contact then it is called
in contact then it is contact force. Non-contact force.
Contact forces
Muscular force-
- The force resulting due to the action of the muscles is Muscular force.
- Since muscular force can be applied only when it is in contact with the body so it is also a contact force.
Friction-
- When the surface of one body is made to slide over other body then friction takes place.
- Since in friction sliding takes place it is also contact force.
Non-Contact forces
Magnetic force
- A magnet can exert some force to another magnet this force is called as Magnetic force.
- It is also non-contact force.
Gravitational force
- Even earth exerts some force in which all bodies fall on it this force is gravitational force.
- It is non-contact force
Electrostatic force
- When charged particle exerts force on to another charged /non-charged then it is electrostatic force.
- It is non-contact force.
Forces can also be divided into
Balanced force Unbalanced force
-The force which cannot change the speed of an object is - The force which can change the speed of an object is unbalanced force.
balanced force.
-It is always 0(zero) - It is always non-zero.
Resultant force
If a single force applied on a body produces same acceleration as one or more forces then this force is called as Resultant force.
Units of force
SI unit of force is NEWTON it is donated by N .
CGS unit of force is DYNE .
Inertia-
The tendency of an object to continue in the form of rest,or motion ,or direction even if some external force is applied then it is called Inertia of rest,Inertia of direction respectively.
Newtons law on motion
1. "Every object in the universe will continue in the state of rest,in uniform motion or in a straight line until or unless some external force is applied"
This law tells us about force.
2. " Force is directly proportional to the rate of change of momentum"
This law gives us a formulae that is
F=ma
Force=mass x acceleration
3. "Every action has an equal and opposite reaction"
