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If you stretch a rubber band around a pole, the band exerts a force onto the surface of the pole (F1 in figure 1). Is it possible to calculate this force if I know the force needed to stretch the rubber band to the same total length as the circumference of the pole? That is to say:

1. I know the force F2 in figure 2

2. The total length of the rubber band is the same in figure 1 and figure 2

Can I calculate the force F1? Is it meaningful to talk about force, or should one talk about the pressure instead?

1. I know the force F2 in figure 2

2. The total length of the rubber band is the same in figure 1 and figure 2

Can I calculate the force F1? Is it meaningful to talk about force, or should one talk about the pressure instead?