"How does the force it takes to stretch a rubber band depend on the AMOUNT by which you stretch it?"
-After completing this lab, we found that by stretching a rubber band over a distance, the more force is required the farther you stretch.
We began this lab by putting a rubber band on an air track:
(We didn't use the red piece^)
Our testing involved stretching the rubber band over various distances and recording how much force was required to hold the rubber band AFTER it was stretched. We were creating potential energy, so we wanted to measure how much force was required to hold the rubber band, not pull it.
We used a force probe to record the force and completed two different types of tests. First we measured the force of 5 separate distances with the rubber band only single stretched; we then double stretched the rubber band and measured the same 5 distances. After all of our testing was complete, we recorded our data and found that the amount of required force to hold the rubber band was increasing.
Single band: Double Band:
1cm - 0.90N 1cm - 5.20N
2cm - 1.05N 2cm - 6.90N
3cm - 2.10N 3cm - 7.78N
4cm - 2.75N 4cm - 10.08N
5cm - 3.60N 5cm - 11.32N
In our world today, we can see this principle being used especially by hunters. Many hunters prefer to use whats known as a compound bow. These are very heavy bows and require great amounts of force to pull back. The farther you pull back the string, the more force you need. When you pull the string back all the way, you've created potential energy.
Fun Fact: Compound bows use pulley systems. This means that you can pull the string back the same distance as a normal bow, but use less force because of the pulley system.
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