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?
-
20 Nm-1
- 40 Nm-1
- 30 Nm-1
- 10 Nm-1
The correct answer is: A
Explanation
F = Ke (Hooke's law)
K = F/e = 80/4
= 20 Nm-1
There is an explanation video available .