Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

⅟₂× (P1 + P2)
P1 + P2
[(√P1 + √P2)/2]²
[⅟₂ × (P1 + P2)] + Pc

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Machine Design
In case of V belt drive

The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley
None of these
The belt should not touch the sides of groove in the pulley

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