In physics, energy is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems. Since work is defined as a force acting through a distance , energy is always equivalent to the ability to exert pulls or pushes against the...
it only rubs each other when the car has put a break after some constant driving.
and pls don't ask me how potential energy is produced over here as if think it a bit u will understand
wat my point is that even though wat u said is correct the thing i don't accept is that friction occurs when two surfaces RUB EACH OTHER.it doesn't happen just like that and so both kinetic energy and potential energy is included in the subject.
Energy to define in simple words is nothing but a force used to do anything
according to physics it can be said like this or if un want it a little more complicated:-
the force used to do a work in terms of whether in motion or at rest . or that is kinetic energy and potential energy...
everyone knows that everything in the world is made upn of atoms. so, take that into point. when two thing for example your hands rub each other at bthat time the atoms also rub causing a electricity like thing which produces heat.its an exothermic reaction according to thermodynamics. its as...
1 sr means 1 steradian steradian is the SI unit of solid angle and 1rad means 1 radian radian is the SI unit of plane angle. Plane angle is defined as:-
An angle of one radian results in an arc with a length equal to the radius of the circle.
Solid angle is defined as:-
the solid angle subtented...