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JAMB Physics 1986 Question 2

Question 2

Elasticity

Figure 1 is a graph of force against extension for a spiral spring. The force constant of the spring is given by the

Diagram for this question
  1. A.slope of the linear portion of the graph
  2. B.length of the linear portion of the graph
  3. C.area under the linear portion of the graph
  4. D.area under the entire graph.
Show the answer and explanation

Answer: A (slope of the linear portion of the graph)

Explanation

Hooke's law F = ke holds on the straight part of the graph, so k = F/e is its slope.