Question

One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram.
(i) Copy the diagram and mark on it the direction of the restoring force.
(ii) Name one instrument which works on the above principle.

Answer 1

(i) The direction of the restoring force is marked in the above diagram, which will be opposite to the displacement in the spring as $f=-kx$.
(ii) Spring Balance works on the principle of restoring force.