Young's Modulus: A 50-kg air conditioner is placed on top of a concrete pad that is 20 cm thick and has a cross-sectional area of 3.0 m2. What is the change in thickness of the pad caused by the air conditioner? Young's modulus for concrete is 2.3 × 1010 N/m2.
A. 1.4 × 10-9 m
B. 2.8 × 10-9 m
C. 1.4 × 10-8 m
D. 1.4 × 10-7 m
E. 2.8 × 10-8 m
Answer: A
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