Question

how much force is needed to stretch a spring 1.2 m if the spring constant is 8.5 n/m?
o 7.1 n
o 7.3 n
o 9.7 n
o 10.2 n

Explanation:

Step1: Recall Hooke's law

$F = kx$

Step2: Substitute values

$F=8.5\ N/m\times1.2\ m = 10.2\ N$

Answer:

D. 10.2 N