Two different types of rubber are found to have the stree-strain curves shown in fig.

(a) In which significant ways do these curves differ form the stree-strain curve of a metal wire.
(b) A heavy machine is to be installed in a factory. To absorb vibrations of the machine, a block of rubber is placed between the machinery and the floor. which of the two rubbers A and B would you perfer to use for this purpose? why?
(c) Which of the two rubber materials would you choose for a car tyre ?