If frequency F, velocity V, and density D are considered fundamental units, the dimensional formula for momentum will be
DVF2
DV2F−1
D2V2F2
DV4F−3
A
DV2F−1
B
D2V2F2
C
DVF2
D
DV4F−3
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Solution
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Momentum =[F]a[V]b[D]c
⟹[MLT−1]=[T−1]a[LT−1]b[ML−3]c
Comparing both sides,
c=1
b−3c=1
∴b=4
Also,
a+b=1
∴a=−3
Therefore,
Momentum =[F]−3[V]4[D]1=DV4F−3
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