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 Form 2 Physics Video Questions and Answers on Hooke's Law

(a) You are provided with two wires of same material and same thickness. Describe how you would make two spiral springs of different spring
constants (assume that other apparatus to make springs are available.
(b) In an experiment, two identical springs are attached end to end.one end of the combined spring is fixed to a rigid support such that the spring
hangs vertically. Masses are then hanged from the lower end.
The graph in figure 8 shows the relation between the force (weight) and the extension for the combined springs. From the graph,
determine:
(i) The elastic limit for the combined springs.
(ii) The springs constant of the combined springs and hence for each spring.
(iii)The work done in stretching the combined spring from 15mm to 32mm.
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