Which of the following are made of metal?
Polythene and steel glass
Nail and hammer
Chair and scooter
Computer and book
Nail and hammer both are made of metal.
Two wires diameter 0.25 cm. One made of steel and the other made of brass are loaded as shown in figure. The unloaded length of steel wire is 1.5 m and that of brass wire is 1.0 m. Compute the elongations of the steel and the brass wires.