A 50-Kg Air Conditioner Is Placed on Top of a Concrete

Multiple Choice

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