(a) Explain the term net force.

(b) Define the principle of conservation of linear momentum and state one example of it.

(c) A ball of mass 200 g released from a height of 2.0 m hits a horizontal floor and rebounds to a height of 1.8 in. Calculate the impulse received by the floor. (g = 10 ms\(^{-2}\)).

(d) A body of mass 20 g performs a simple harmonic motion at a frequency of 5 Hz. At a distance of 10 cm from the mean position, its velocity is 200 cms\(^{-1}\). Calculate its:

(i) maximum displacement from the mean position;

(ii) maximum velocity;

(iii) maximum potential energy. (g = 10 ms\(^{-2}\) \(\pi\) = 3.14)