1.

Derive S.I. unit of Joule (J) in terms of fundamental units.

Answer»

Joule is a unit of work.

Now by using the formula of work done 

W = F s(F = force and s = displacement)
= Mas    (a = acceleration)
= Msv/t   (v = velocity  and t = time)
=Ms s/t​2 (as velocity is displacement /time)
W = M s2/t2

hence the above formula is in form of its fundamental units like mass, time and length and the dimension formula of joule = ML2T-2



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