1.

The dimensional formula for acceleration, velocity and length are alphabeta^(-2), (alphabeta)^(-1) as and alphagamma. What is the dimensional formula for the coefficient of friction?

Answer»

`alphabetagamma`
`ALPHA^(-1)BETA^(0)GAMMA^(0)`
`alpha^(0)beta^(-1)gamma^(0)`
`alpha^(0)beta^(0)gamma^(-1)`

SOLUTION :Here, `a= LT^(-2)= alphabeta^(-2), v= LT^(-1)= alphabeta^(-1)`
`:. alpha= L, beta= T, L= alphagamma :. Gamma =(L)/(alpha)= (L)/(L)= 1`
Coefficient of friction `mu= (F)/(R)= [M^(0)L^(0)T^(0)]`
Check all the four given expressions and find which one is DIMENSIONLESS.
`alpha^(0)beta^(0)gamma^(-1)= [L^(0)T^(0)(1)^(-1)]=1` Which is dimensionless.


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