what is concept of centripetal force and define centripetal acceleration

Centripetal Force

               The force needed to bend normally straight path of particle into circular path is called centripetal                                                  

                     force.It is denoted by Fc.

Centripetal force formula

                                               

                                         It is also known as inward force or center seeking force.

Explanation

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what is elastic and inelastic collision

Elastic collision 

         A collision in which kinetic energy of the system is conserved is called elastic collision.

In the ideal case when no kinetic energy is lost, the collision is said to be perfectly elastic.

Example

       when a hard ball is dropped onto a marble floor, it rebounds to very nearly the initial height. It loses negligible amount of energy in collision with the floor.

Inelastic collision

       A collision in which kinetic energy of the system is not conserved , is called the inelastic collision.
Example
      When tow tennis balls collide the then after collision , they rebound with velocities less than the velocities before, the inspect. During this process a portion of K.E is lost,partly due to friction as molecules in

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energy and there are to basic forms of kinetic and potential energy

Energy

     i read in my books word of  energy derive from energeia.  

     we defined as about energy  The ability of a body to do work is called energy.

     There are to basic forms of energy.

                                                                                 

 Kinetic and Potential energy                                                                              

What is kinetic energy 

    we also discus about energy and kinetic energy is other form of energy.kinetic word is derived from Greek word kinesis meaning motion.

      The possessed by a body due to its motion is called kinetic energy.
        it is given by the formula.

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what is work

work Definition 

       we can says work is the product of magnitude of  displacement and component of force in the direction of displacement. 

Explanation
      Let us consider an object which is being pulled by content  force F at angle theta to the direction of motion.The force F moves the object from position A to B through displacement D as shown in figure.

Now by definition work is given by.
                                   

W = (F cos 0) (d)

                                                                         = Fd  cos 0
where,
               F Cos 0 is component of force in the direction of displacement.

example of work

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Differance between Momentum and Impulse

Momentum:

                  Moving object possesses a quality virtue of which it experts a force on anything that tries to stop it.The faster the object is traveling, the harder to stop it.If two object moves with same velocity, then it is difficult to stop the massive of the two.
By Newton, this quality of moving body was called the quantity of motion of the body. this is now called linear momentum of body.

Definition of momentum:

                  the product of mass and velocity of body is called linear momentum.

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Inertia

                The property of an object tending to maintain the state of rest or state of uniform  motion is referred to as the object's inertia.
                The more is the inertia, the stronger is this tendency in the presence of a force.
thus,
                "The mass of the object is a quantitative measure of its inertia".
we can says Newtons first law of motion called law of inertia.newtons first law is that
                 A body at rest will remain at rest, and a body moving uniform velocity will continue to do so, unless acted on by some unbalanced external force.This is also known as law of inertia.

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Scalars and vectors

what is scalars

                  Physical quantities like as length, area, volume and mass can be completely
described by a single real number. therefore,  these quantities are describable by giving
only a magnitude, they are called scalars.then we can says
                          "Physical quantities which require only magnitude are called scalars".
Examples: length, area, volume, mass, density, pressure,work,power, etc. 

what is vectors

               Physical quantities like as displacement, velocity, force and acceleration require both a magnitude and a direction to completely describe them.  Such quantities are called vectors.then we can says
                           "Physical quantities which require both magnitude and direction for their complete

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what is physics definition

The branch of science which deals with the study  of matter and energy and the relationship between them is called physics.

we can also called about what is physics  The study of physics involves investigation of such things as the laws of motion,the structure of space and time,the nature and type of forces that hold different materials
together, the interaction between different particles, the interaction of electromagnetic radiation with matter and so on.

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