Practial 5 - Investigation of the force-extension relationship of rubber Flashcards
What do we hang from a stand, boss and clamp?
Cut rubber band
Where do we hang the cut rubber band from?
The stand, boss and clamp
What’s the cross-section of the rubber band used?
1mm by 2mm
What do we hang from the band?
50g mass holder
What do we use to measure the length of the band?
A metre rule
Resolution of the metre rule used
+-0.001m
How can we accurately measure the extension?
Using an optical pin attached to the base of the mass holder
Where would an optical pin be attached and what would this do?
The bottom of the mass holder to accurately measure the band’s length
What do we also need to measure for the rubber band as well as length after being stretched?
Width and thickness
What do we measure the width and thickness of the rubber band using?
A micrometer
Resolution of the micrometer
+-0.01mm
What do we need to take care not to do when measuring the width and thickness of the rubber band?
Squish the band with the micrometer
How do we increase the mass on the rubber band?
In 50g steps
What are we measuring each time we add new weights and how do we work this out?
Extension (new length-original length)
When do we stop measuring the rubber band?
When it breaks
