The CClamp is tightened to exert a camping force of 500 poun

The C-Clamp is tightened to exert a camping force of 500 pounds on the wood. Given: the cross section a-a is rectangular with dimensions 0.75 inch Times 0.50 inch. Determine the minimum and maximum normal stresses occurring on cross-section a-a Determine the value of normal stress occurring at the centroid on cross-section a-a Make a sketch of the distribution of normal stress on cross-section a-a.

Solution

A 30-mm bore series 02 angular-contact ball bearing carries a 700-lb radial load and a 1200-lb thrust load. The inner ring rotates at 1500 rpm. Determine the rating life in hours.(Note 1 lbf=4.45N) (answer: 250 hrs) I am using the Shigley S Mechanical Engineering Design 9th edition textbook and need a detailed explanation.