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# The Effect Of Different Size Rubber Bands On Stretch Rates

664 words - 3 pages

Three different size rubber bands each with their own rate of stretch when weight is added. By creating a makeshift basket, the group was able to connect a rubber band to a ring stand. After two washers were added, the group would calculate how much the washers would affect the rate of stretch of each rubber band. Multiple washers were added until the maximum amount of weights were in the basket. The shorter rubber band took more weight in order to stretch the rubber band, however the larger rubber band would not require as much force to change the rate of stretch of the rubber band. Each rubber band had its own stretch rate. The stretch of the rubber band when weight is added is affected by the length of the rubber band.

Materials and Methods:
Independent Variable- Length of the rubber band.
Dependent Variable- Rate of stretch when weight is added.
Control Variables-
• Same person measures rate of change- Avoids any miscalculations from other persons.
• Same washer size- Different size washers could tamper with the weight and rate of stretch.
• Stationary ring stand- By having the ring stand taped to the table, avoids the ring stand from shifting and avoiding faulty calculations.
• Unused rubber bands- If a stretched rubber band is used, it could alter the rate of stretch.
Assumptions:
• All materials are quality controlled.
• Different size rubber bands are the same material.
• Rubber bands are unstretched and unused.
Materials:
1. One 7.62 cm x 0.3175 cm rubber band
2. One 8.89 cm x 0.3175 cm rubber band
3. One 17.78 cm x 0.3175 cm rubber band
4. Four paper clips
5. Dixie Cup
6. Ring Stand
7. Meter Stick
8. 20 Same Size Washers
9. Scotch Tape
Procedure:
1. With a hole puncher, make two holes in the cup. One on each side. Clip three paper clips together, with the two end paper clips through the holes....

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