Which one of the following gives the correct mathematical expression for the…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Which one of the following gives the correct mathematical expression for the restoring force acting on an ideal spring when it is displaced by

x

from its equilibrium position? (a)

F=+kx

(b)

F=-\dfrac{1}{2}kx

(c)

F=-kx

(d)

F=\dfrac{1}{2}kx