Question

If the bending stress σ is 1 N/m2, what is the value of σ in lb/in2 (psi)?

If the bending stress is 1 , what is the value of in ()?
A.0.000145
B.0.0209
C.0.333
D.47.9

Answer 1

To convert 1 N/m2 (pascals) to psi, a conversion factor of 1 lb/in2 = 6.90 × 103 N/m2 is used, resulting in a value of approximately 0.000145 psi. The correct answer is A.

Step-by-step explanation:

The task involves converting a measure of bending stress from one unit system to another. Specifically, we need to convert 1 N/m2 (pascal) to pounds per square inch (psi). The conversion factor from N/m2 to psi is given as 1.0 lb/in2 = 6.90 × 103 N/m2. To convert 1 N/m2 to psi, we apply the unitary method.

• First, we set up the conversion: 1 N/m2 × (1 lb/in2 / 6.90 × 103 N/m2)
• Canceling out the units, we have 1/6900 lb/in2, which is approximately 0.000145 psi.

Therefore, the value of σ in lb/in2 when the bending stress is 1 N/m2 is approximately 0.000145 psi which corresponds to option A.