1.29 describe experiments to investigate how extension varies with applied force for helical springs, metal wires and rubber bands
Experiment: Investigating extension with applied force in spring
Apparatus: Spring/Wire/Rubber-band, Scale, Some masses, Clamp and stand, mass hanger
Working procedure:
- Take the length of the normal condition.
- Add a mass in the mass hanger and determine the extension by using the porter and the scale.
- Add another mass gradually and determine the extension in all cases.
- Plot a graph of extension and relevant loads.
Observation with helical spring:
Since the graph of load & extension is a straight line, which proves the extension and load are directly proportional.
Observation with rubber band:
Since the graph didn’t produce a straight line, extension is not directly proportional to load force. But extension still increases as the force is applied.
Observation with metal wire: