Calculate the amount of force necessary to stretch a linear spring a certain displacement given the spring constant.

Example question:

A linear spring has a constant of 310 N/m. How much force is necessary to stretch it 0.21 m?

Given:

spring constant: k = 310 N/m

displacement: x = 0.21 m

Starting formula

Plug in numbers with units

Multiply: (310)(0.21) = 65.1

Final result with significant figures and unit