P11.54 The solid 1.00-in.-diameter steel [$E = 29,000 ksi$] shaft shown in Figure P11.54 supports three belt pulleys. Assume that the bearing at A can be idealized as a pin support and that the bearings at C and E can be idealized as roller supports. For the loading shown, determine
(a) the reaction forces at bearings A, C, and E.
(b) the magnitude of the maximum bending stress in the shaft.
A
B
C
D
E
F
15 in.
15 in.
15 in.
15 in.
10 in.
200 lb
280 lb
120 lb