According to the hooke’s law formula, the force is proportional to what measurement?
the length of the spring
the mass of the spring
the displacement of the spring
the period of the spring

The correct answer is the displacement of the spring.

Explanation:

Hooke's Law is used to determine the force applied when a spring is compressed or extended. The formula for Hooke's Law is given by the equation:

Removing proportionality sign,

where,

F = force applied on the spring

k = Spring constant

x = Compression or extension of the spring. In other words it is the displacement of the spring.

Hence, from above relation, it is visible that force is directly proportional to the displacement of the spring.

option number c is the right answer.