A cable used to lift heavy materials like steel I-beams must be strong enough to resist breaking even under a load of 1.4 x 106 N. For safety, the cable must support twice that load.
(a) Find what cross-sectional area should the cable have if it's to be made of steel?
m2
(b) Determine by how much will a 9.0 meter length of this cable stretch when subject to the 1.4 x 106 Newton load?
m