Q. The pointer reading $v/s$ load graph for a spring balance is as given in the figure. The spring constant is
A) $0.1\ kg/cm$
B) $5\ kg\ cm$
C) $0.3\ kg/cm$
D) $1\ kg/cm$
Explanation
(a) Spring constant $k = \frac{F}{x} =$ Slope of curve
$\therefore k = \frac{4 - 1}{30} = \frac{3}{30} = 0.1\ kg/cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.