Question

Two springs have different spring constants. How could you identify the spring with the greater spring constant value?

Answer 1

Hooke's Law:
F = ke

k - spring constant, force per unit length

A larger spring constant would need a larger force to cause the same extension between two springs.
eg.
spring 1 needs 90 N to extend 1 mm.
spring 2 needs 150 N to extend 1 mm.

Therefore, spring 2 has a larger spring constant.