What force is required to stretch a steel wire of cross- section 1sq cm to double its length `(Y = 2 x 10^11 Nm^-2)`

The radius of a copper rod is 4 mm . What force is required to stretch the rod by 10 percent of its length ? Y for copper = 12 xx 10^10 N/m^2 .

The radius of a cupper wie is 4 mm . What force is required to stretch the wire by 20% of its length, assuming that the elastic limit is not exceeded ? (Y = 1.2 xx 10^11 N/m^2)

Show that, for an elastic material, the young's ,modulus is numerically equal to the force required to stretch a rod of unit cross sectional area to twice its length.

The diameter of steel rod is 8 xx 10^(-3) m. What force will stretch it by 0.3% of its length (Y = 20 X 10^11 N/m^2)

What mass must by suspended from free end of steel wire of length 2m and diameter 1 mm to stretch it by 1 mm ? (Y = 2 xx 10^11 N/m^2,g = 9.8m/s^2)

How much will a steel wire 2m long and 1mm diameter stretch under a 5 kg wt. load ? (Y = 2 xx 10^11 N/m^2)