Answer
The correct answer is:
D. $6.5~N/m$
Work Step by Step
We can find the spring constant:
$kx = mg$
$k = \frac{mg}{x}$
$k = \frac{(0.10~kg)(9.80~m/s^2)}{0.15~m}$
$k = 6.5~N/m$
The correct answer is:
D. $6.5~N/m$
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