The diagram above represents the graph of the force F applied in stretching a spiral...

JAMB 2009

The diagram above represents the graph of the force F applied in stretching a spiral spring against the corresponding extension (X). The force constant of the spring is?

A. 20 Nm^-1
B. 40 Nm^-1
C. 30 Nm^-1
D. 10 Nm^-1

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Correct Answer: Option A

Explanation

F = Ke (Hooke's law)
K = F/e = 80/4
= 20 Nm-1

There is an explanation video available below.

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The diagram above represents the graph of the force F applied in stretching a spiral...

Correct Answer: Option A

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