Question

Define kinetic energy. Write its expression.

Answer 1

energy possed due to the motion is called kinetic energy
formula =1÷2mv^2
m =mass in kg
v = speed

Answer 2

WE OBSERVE THAT EVERYTHING IS HAPPENING IN THE WORLD ,BUT WHEN WE TRY TO KNOW ABOUT HOW ALL THIS IS HAPPENING ,WE SAY THAT SOMETHING IS THERE WHICH IS CALLED AS ENERGY,THAT ENERGY IS DRIVING EVERYTHING AND IS CONSTANT IN UNIVERSE.THERE EXIST VARIOUS KINDS OF ENERGY  LIKE POTENTIAL ENERGY ,KINETIC ENERGY, CHEMICAL ENERGY ETC....WHICH CAN BE CONVERTED FROM ONE FORM TO OTHER AND VICE VERCA. WHEN A PARTICAL IS IN MOTION ,IT HAS A TYPE OF ENERGY WHICH IS CALLED AS KINETIC ENERGY.AND ITS MAGNITUDE IS 1/2*(MASS*VELOCITY^2).EVERYTHING THAT IS IN MOTION POSSES KINETIC ENERGY