Question

Janet wants to find the spring constant of a given spring, so she hangs the spring vertically and attaches a 0.61 kg mass to the spring's other end. if the spring stretches 4.0 cm from its equilibrium position, what is the spring constant?

Answer 1

Given: Mass m = 0.61 Kg;      Displacement  x = 4.0 cm  or  x = 0.04 m

Required:  Spring constant  k = ?

Formula:  F = kx

                k = F/x

                k = (0.61 Kg)(9.8 m/s²)/0.04 m

                k = 149.45 N/m