😱 FOURCE (बल) 😱

       Class--9,10.  

      ( PART -1)            

                        FOURCE.   

             

 Definition:-

Force is External agent which is responsible for changing the state off rest and motion of an object.

😈 force is a pull or push.😈

1) Pull:- object move towards the body 

2)Push:- object move away from the body

      

                 TYPES OF FORCE 

👉FUNDAMENTAL FORCE

1. Gravitational force
2. Electromagnetic force
3. Strong nuclean
4. Weak nuclean

😱Contact and Non contact🙊

1) Contact :- There are two types

           

            A) Muscular force

            B)  Friction force

2) Non Contact:- There are three types 

            

             A) Gravitational force

             B) Electromagnetic force

             C) Magnetic force

        👉 EFFECTS OF FORCE 👈

       1) Rest -> Motion

       

       2) Motion -> Rest

       3) Direction -> Change

 

       4) Shape and Size -> Change

🌟NOTE :-  

           1)Force can not be seen

                            👇

          2)But we can feel and observe  the effect of force

   

😍Balanced and un-balanced Force😍

•Balanced Force:- Brings No Change

             

                 Eg: 20N=20N

•Un-balanced Force:- 

                

               Any Change

                      👇

         Un-balanced Force 

         Eg:- 20N=30N

🕵️ Difference between Balanced and un-balanced Force 🕵️

         👉Balanced Force👈

1} It is the condition where net force acting on a body is zero.

2} Net acceleration is zero.

3} It is the reason behind maintaining the previous inertia of the body.

4} Body will be at rest or uniform motion (constant speed) according to previous inertia.

        👉 Un-Balanced force👈

1} It is the condition where net force acting on a body is non-zero.

2} Net acceleration is non-zero.

3} It is the reason behind changing the inertia of the body.

4} Body vil bi moving with uniform acceleration.

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Q] A 8000kg engine pulls a train of 5 wagons, each of 2000kg, along a horizontal track.If the engine exerts a force of 40,000N and the track offers a friction force of 5000N, then calculate the net accelerating force?

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Q] A force can not change.

     a) Direction 

     b) Speed 

     c) Mass

     d) Shape 

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🤯 Inertia: Rest, Motion and Direction🤯

     

=> Inertia is a property of a body to oppose the change in its state, rest or motion.

=> Inertia can be of three types:-

             1) Rest

             2) Motion 

             3) Direction

=> Inertia is directly proportional to the mass of the body.

=> More the mass, more will be the inertia.

NOTE:----

Inertia directly proportional to mass.