1.

If velocity (V) , force (F), and energy (E) are taken as fundamental units , then find the dimensional formula for mass.

Answer» Let `M = V^(a) F^(b) E^( c ) `
Putting dimensioons of each quantities on both sides
`[M] = [LT^(-1)] ^(a) [MLT^(-2)]^(b) [ML^(2)T^(2)] c`
Equating powers of dimensions , we have
` b + c =1 , a+b + 2 c = 0 , and -a -2b- 2c = 0`
Solving these equations , ` a = -2 , b = 0 , and c= 1`.
So ` M = [ V^(-2) F^(0) E]`


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