Experiment to find extension of spring with different

Experiment to find extension of spring with different masses Set up of equipment spring clamp stand ruler masses on holder

Instructions 1. Set up the equipment as shown in diagram. 2. Measure the length of the spring in centimetres (cm) for each mass you add – starting from 0 g to the maximum number of masses given to you. 3. Write your results in the table as shown by your teacher. 4. Work out from your results the extension of the spring in centimetres (cm). 5. Draw a graph of your results.

Complete the table with your results MASS (g) FORCE (N) LENGTH (cm) EXTENSION (cm)

How to find the extension of a spring Normal Length Extension = length – normal length Masses on holder

DRAW A BEST LINE OF FIT GRAPH FROM YOUR PLOTTED RESULTS EXAMPLE GRAPH E x t e n s i o n 20 18 16 BEST LINE OF FIT 14 12 10 8 6 4 (cm) 2 0 1 2 3 4 5 6 7 8 9 10 Force (N)

Finding the relationship between Force and Extension – HOOKE’S LAW E x t e n s i o n Force (N) 20 18 Extension (cm) 0 0 1 2 2 4 10 3 6 8 4 8 6 5 10 4 6 12 7 14 8 16 9 18 10 20 16 14 12 (cm) 2 0 1 2 3 4 5 6 7 8 9 10 Force (N)

The graph shows that when the force is doubled the extension of the spring is doubled. It also shows that when the force is halved the extension of the spring is halved. This means that the extension the force added. is proportional to This relationship is called : - HOOKE’S LAW

26 24 22 E x t e n s i o n (cm) B 20 18 breaking Point 16 14 A 12 10 elastic Limit 8 6 extension proportional to force added (Hooke’s Law) 4 2 0 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 Force (N)

Find the extension of the following spring combinations

Find the lengths of the following springs