What is the SI unit for energy? How is it determined?

the SI unit of vitality is joules or (J)

J = Nm or J = kg m^2/s^2 (this is something for the most part identified with measurements)

presently, we state that vitality has SI unit Joules which is equivalent to the Work done in light of the fact that you NEED the vitality to do work… in the event that no vitality, there is no work

W=Fs (where s=displacement)

=mas(since F=ma)

FOR POTENTIAL DIFFERENCE

=mgh(where a=g; s=h)

FOR KINETIC ENERGY

=msv/t (presently accepting that the article was very still previously, it's underlying speed, for example, u=0 m/s)… (I)

Utilizing VELOCITY-TIME-GRAPH-EQUATIONS,

s=ut +at^2/2, for example, half at the square in addition tout

s=at^2/2 for example at the square by two (from (I))

s=vt^2/t for example vt square by t, since a=v/t

s=vt (since t gets dropped)… ..(ii)

substituting (ii) in (I)

W=mvtv/2t

W=mv^2/2 … for example half mv square (since t gets dropped)

Subsequently PROOVED