Question

define energy and diffreent forms of energy​

Answer 1

Energy is capacity of doing work.
And this is the examples of energy

Answer 2

Energy :-

The capacity to do work is called Energy

• Energy are different forms like
• Gravitational potential energy

• Kinetic energy
• Potential energy
• Mechanical energy
• Elastic potential enrgy
• Electric potential energy

Lets discuss one by one with formula !

☆Potential energy

The energy possessed by body by virtue of its position or configuration is known as potential energy

Note :-

Potential energy is defined for conservative forces only

☆ Gravitational potential energy:-

The Gravitational potential energy of two particles of masses m1 ,m2 separated by a distance r is given by

U = $\sf\dfrac{-Gm1m2}{r}$

• Negative sign indicates the force is attractive in nature
• Work done against by Gravitational force is mgh
• Work done by Gravitational force is mgh

☆Kinetic energy :-

The enrgy possessed by a body of virtue of its motion is known as Kinetic energy

K.E = $\sf\dfrac{1}{2}$mv²

• K.E is always positive
• K.E doesn't depends on direction of motion
• Kinetic energy depends om frame of reference

☆Mechanical energy :-

The Mechanical energy of a system is the sum of potential energy & kinetic energy

E = K + U

E is Mechanical energy

K is Kinetic energy

U is potential energy

• A body can have Mechanical energy without either K.E or P.E

☆ Elastic potential energy :-

When a spring is streched or compressed by an amoynt x from its unstreched position the Elastic potential enrgy is stored

U = $\sf\dfrac{1}{2}$kx²

• Where k is called spring constant its unit is N/m
• Elastic potential energy is always positive
• At natural state of spring the elastic potential energy is 0

☆Electric potential energy

The Electric potential energy of two point charges q1, q2 separated by distance r in vaccum is given by

• Electric potential energy depends upon medium between charges