1.29 describe experiments to investigate how extension varies with applied force for helical springs, metal wires and rubber bands

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:

1. Take the length of the normal condition.
2. Add a mass in the mass hanger and determine the extension by using the porter and the scale.
3. Add another mass gradually and determine the extension in all cases.
4. 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: