Dimensional formula of energy, [ Energy ]=[ML2T−2] Dimensional formula of speed, [‌ speed ‌]=[LT−1] Dimensional formula of ‌ Energy ‌×‌ speed ‌‌=[‌ Energy ‌][‌ speed ‌] ‌=[ML2T−2][LT−1] ‌=[M1L3T−3] ‌=[MaLT1]  (given) ∴‌‌a=1,b=3,c=−3