Q. An ideal spring with spring constant $K = 200\ N/m$ is fixed on one end on a wall. If the spring is pulled with a force $10\ N$ at the other end along its length, how much it will extended?
A) $5\ cm$
B) $2\ m$
C) $2\ cm$
D) $5\ m$
Explanation
(a) $K = 200N/m,\ F = 10N$
Let the elongation be $x$
$F = Kx$
$10 = 200 \times x \Rightarrow x = \frac{1}{20}m \Rightarrow x = 5cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.