Question

Our rule-of-thumb for presenting final results is to round to three significant digits or four if the first digit is a one. By this rule, write the result for

σ = Me/I , where M= 1835 lbf in and I/c = 0.875 in^3

Answer 1

To four significant digits = 2097 psi

Step-by-step explanation:

Applying the rule of thumb

σ = Mc/I ---- ( 1 )

M = 1835 Ibf in , I/c = 0.875 in^3

∴ c/l = 1 / 0.875 = 1.1429

back to equation 1

σ = 1835 * 1.1429 = 2097.2215 psi

To four significant digits = 2097 psi