Two ideal springs with force constants and are connected in series

PHYSICS · Subjective · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics

Problem

Two ideal springs with force constants

k_1 = 60\,\text{N}\!\cdot\!\text{m}^{-1}

and

k_2 = 40\,\text{N}\!\cdot\!\text{m}^{-1}

are connected in series. Calculate the effective force constant

k_{\text{eq}}

of the combination. Provide your answer with appropriate units.