A 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod? Young's modulus for steel is 20 × 1010 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
A
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