A spring balance consists of a spring of length with a hook attached

PHYSICS · Single correct · CBSE · Physics · Oscillations · Oscillations

Problem

A spring balance consists of a spring of length

20.0\text{ cm}

with a hook attached. When a fish of mass

3.0\text{ kg}

is suspended from the hook, the new length of the spring is

27.0\text{ cm}

. What is the spring constant of the spring? (A)

4.2\text{ N m}^{-1}

(B)

43\text{ N m}^{-1}

(C)

110\text{ N m}^{-1}

(D)

420\text{ N m}^{-1}