Science Notes on Kinetic Energy: CBSE Class 9

BY Team Aakash Byjus

 A form of energy that any object/particle has by reason of its motion is called Kinetic energy.

If work is done on any object by applying the force, the object starts moving and thus gains kinetic energy.

Click Here To Attend Free Trail Class

Kinetic energy is a scalar quantity as it provides only magnitude and not direction.

Kinetic energy can never be negative.

Its SI unit is joule or kg.m2.s-2.

 The flow of a river is an example of kinetic energy because the water has some mass and velocity while moving.

 An asteroid falling toward earth is very large and thus has kinetic energy.

Kinetic energy is transferable to other projects and transmissible into other forms of energy.

 Kinetic energy can be expressed in terms of the mass of the object and its velocity as- KE = (½)mv2

Radiant energy, thermal energy, sound energy, electrical energy, and mechanical energy are the forms of kinetic energy.

Don’t forget these points to add in your revision notes on Kinetic Energy.