Learning Forum

[peteroznewman]

Say you have a 100 cm long rubber band. Anchor one end to a pin and put a force sensor on the free end.
Stretch the free end by 50 cm (strain = 0.5) and find the force is F.
Cut the rubber band down to 10 cm and stretch it by 5 cm (strain = 0.5), the force is still F.
Cut the rubber band down to 1 cm and stretch it by 0.5 cm (strain = 0.5), the force is still F.
If you replace the pin-anchored end with a force sensor, it will also measure F.