What is the correct answer?

4

# 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

[(√P1 + √P2)/2]²

P1 + P2

2 × (P1 + P2)

[2 × (P1 + P2)] + Pc Where Pc is centrifugal tension