A Vertical 30-Cm Steel Rod, 1

Multiple Choice

A vertical 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod caused by this mass? Young's modulus for steel is 2.0 × 10¹¹ N/m².

A) 5.6 × 10^-5 m
B) 6.5 × 10^-5 m
C) 5.6 × 10^-6 m
D) 6.5 × 10^-6 m
E) 6.5 × 10^-4 m