Spring #1 has spring constant 61.0 N/m.Spring #2 has an unknown spring constant,but when connected in series with Spring #1,the connected springs have an effective spring constant of 20.0 N/m.What is the spring constant for Spring #2?
A)41.0 N/m
B)81.0 N/m
C)15.1 N/m
D)29.8 N/m
E)71.0 N/m

Question

Quizplus · Accepted Answer

The formula for springs in series is 1/k_eff = 1/k1 + 1/k2. Solving for k2 with k_eff = 20.0 N/m and k1 = 61.0 N/m gives k2 ≈ 29.8 N/m.

Spring #1 Has Spring Constant 61