Difference Between Kinetic Energy And Potential Energy
| KINETIC ENERGY | POTENTIAL ENERGY |
|
Definition |
|
| The energy due to the motion of a body is called Kinetic energy. | Is the energy possessed by a body by virtue of its position or configuration? |
|
Mathematical Measurement |
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| Kinetic energy possessed by a body of mass m moving with velocity y can be calculated
By K.E. = |
Potential energy possessed by a body of
mass m at height h can be calculated by P.E. = mgh |
KINETIC ENERGY
Definition
When a body is capable of doing work by virtue of its motion, the energy is called kinetic energy.
OR
The energy is associated with a mass due to its motion is called kinetic energy.
ELASTIC POTENTIAL ENERGY
Definition
The energy stored in a stretched or compressed elastic material such as a spring is called elastic’ potential energy.
EXPLANATION
1f a spring is wound, work is done in winding it against the elastic force of spring. This work is stored IN
the spring as potential energy- This type of potential energy is due to the constrained position of the spring
EXAMPLE
In figure, a force ‘F’ pushes a spring to compress it from its equilibrium position ‘O’ to some other
position x. This force is directly proportional to the amount of compression.
i.e. F
or F = Kx
Where ‘K’ is force constant (spring constant) its value depends on how stilt the spring ¡s Since the
the compression force is zero at O’ and l(x at x, the average force needed to compress the spring from
Position O to x is
Therefore work done In Compressing the spring is W = X
Or W = K
This work causes the elastic potential energy. there tore
Elastic potential energy =
