Investigating stretching forces

Tara and Shelly added 100g masses to a spring and measured how much it extended each time a 100g mass was added. They used a ruler to measure this. They took seven measurements between 100g and 700g. Then Tara plotted the graph below.

Think About

What conclusion can be made from the evidence that Tara and Shelly have collected?

How reliable is their evidence?

What could they do to improve their evidence?

What to do:

Describe the pattern from Tara and Shelly’s results.

Make a conclusion and try to explain it.

Describe what Tara and Shelly could do to improve their investigation.

Key words

Extension, mass, Newtons, weight, confidence, evidence, particles, range, reliable, repeat and stretching force