Question
a 10m long steel cable is lifting a 30 ton crate upward off a ship. If the cable streches by .5cm under these conditions, determine the radius of the steel cable. Young's modulus of steel :2x10raised to 9 Pa
Answers
assume metric ton of 1000 kg
tension = m g = 30*10^3 *9.81 Newtons
area = pi r^2
5*10^-3/10 = 30*10^3*9.81 /[pi r^2 *2*10^9]
tension = m g = 30*10^3 *9.81 Newtons
area = pi r^2
5*10^-3/10 = 30*10^3*9.81 /[pi r^2 *2*10^9]