Answer the following questions about the graphical representation of kinetic energy.
a. (i) Sketch the qualitative shape of the graph of kinetic energy K versus speed v for a body of fixed mass and state the nature of the curve.
b. (ii) Sketch the graph of K versus v² for the same body and comment on its shape.
c. (iii) Explain why, in an experiment aimed at finding the mass of a moving object, a K–v² graph is generally preferred over a K–v graph.