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.

Name: 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 × 10 10 N/m 2 .
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Question

Quizplus · Accepted Answer

The change in length is calculated using the formula ΔL = (F*L) / (A*Y), where F = mg = 300*9.8 N, L = 0.3 m, A = π*(0.005 m)^2, and Y = 20 × 10^10 N/m². This gives ΔL ≈ 5.6 × 10^-5 m.

A 30-Cm Steel Rod, 1