Physics Exam Notes

BY Team Aakash Byju's

Mechanical Energy and Its Different Forms

In physics, it is defined that energy is the capacity to do work.

Click Here To Attend Free Trail Class

Types of energy - Mechanical, potential, chemical, kinetic, thermal, solar energy, etc…

Potential energy and kinetic energy are two forms of mechanical energy.

POTENTIAL ENERGY

MECHANICAL ENERGY Forms

KINETIC ENERGY

The sum of kinetic energy and potential energy in a system used to do work is called ‘Mechanical Energy’.

The stored energy in an object that depends on the relative position of another system is called 'Potential Energy'.

Potential energy can bro found using the formula   E = mgh ( where 'm' is mass of the object, 'g' is acceleration due to gravity and 'h' is the height)

Potential energy is subjected to the motion of an object. The SI unit of potential energy is kg m2 / s2 or joule.

2 types of potential energy are:

- Gravitational potential energy  - Elastic potential energy.

For an object that is at rest, the work done to accelerate the object is called ‘Kinetic Energy’.

The kinetic energy can be found using the formula:  KE =(½)mv2 where m is the mass and v is the velocity of the body.

There are 5 types of kinetic energy:

- Radiant, - thermal, - sound, - electrical, - mechanical energy.

The unit of kinetic energy is also the same as the SI unit of potential energy.

Hope you have noted it down. Now don't forget to revise this before physics exam.