When the perfectly elastic belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to ________. (Neglecting centrifugal tension.)
1
Tension in the tight side of the belt
2
Tension in the slack side of the belt
3
Sum of the tensions on the tight side and slack side of the belt
4
Average of the tensions in the tight side and slack side of the belt