Explanation of Potential Energy and Kinetic Energy (Animation)
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Potential Energy and Kinetic Energy
Chapters:
0:00 Kinetic school's intro
0:14 Energy
0:24 Potential Energy
0:53 Kinetic Energy
1:19 Types of potential energy
2:50 Types of Kinetic Energy
4:48 Derivation of Potential energy
6:15 Derivation of kinetic energy
Potential Energy and Kinetic Energy:
Potential energy is the capacity for doing work that a body possesses because of its position or condition.
Ep=mgh
On the other hand,
Kinetic Energy is defined as energy, that a body possesses by virtue of being in motion.
Ek= ½ mv²
Types of potential energy:
1. Elastic potential energy
2. Gravitational potential energy
3. Chemical potential energy
4. Nuclear energy
Types of Kinetic Energy:
1. Radiant energy
2. Thermal energy
3. Sound energy
4. Motion energy
5. Electrical energy
Potential Energy of an object that depends on its
–
mass or charge and Distance from the center of mass of another object.
Derivation of Potential energy:
Let's now consider the work done when we lift an object.
In order to lift an object that has mass m, we have to apply an upward force mg to overcome the downward force of gravity.
If this force raises the object through a height, then the work done is:
W= Fd
therefore,
W = mgh
This work done (W) is stored as potential energy in the object.
So, Ep= mgh.
On the other hand,
The kinetic energy of a moving object depends upon its Mass and Speed or velocity
Derivation of kinetic energy:
As we know,
Work done is equal to force multiplied by Distance.
that means, W= FS
By Newton's Second law: F= ma, ….. (1)
Again,
From Third equation of motion: v² = u² + 2aS …..(2)
if at rest u= o then from the equation 2
we can get,
v² =2as
s= v²/2a
From the equation 1, 2 and 3,
W= ½ mv²
Since work done is stored in kinetic energy,
so , Ek= ½ mv²
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