The stress-strain graphs for materials A and B are shown in Figure.The

1.	The stress-strain graphs for materials A and B are shown in Figure.The graphs are drawn to the same scale. 1. Which of the materials has the greater Young’s modulus? 2. Which of the two is the stronger material?
Answer» 1. Material A has greater Young’s modulus as the slope of the graph of material A is greater than material B. Young’s Modulus = Y = Slope = \(\frac {stress}{strain}\) ∴ Material A has greater Young’s Modulus. 2. From the graph it can be approximated that the stress at the fracture point for material A is higher than material B, thus material A is stronger.

The stress-strain graphs for materials A and B are shown in Figure.The graphs are drawn to the same scale. 1. Which of the materials has the greater Young’s modulus? 2. Which of the two is the stronger material?

Answer»

1. Material A has greater Young’s modulus as the slope of the graph of material A is greater than material B.

Young’s Modulus = Y = Slope = \(\frac {stress}{strain}\)

∴ Material A has greater Young’s Modulus.

2. From the graph it can be approximated that the stress at the fracture point for material A is higher than material B, thus material A is stronger.