Today Lecture outline • Final exam review • Machines • Friction • Distributed loads • Composite area
D=320 lb 600 E=716 lb 750 F=540 lb 50.30 Class Assignment: Exercise set 7-105 Determine all forces on member DEF of the frame shown in fig. P7-105. 140 lb/ft C B A 2 ft 75° 60° E D F 2 ft 3 ft
Example 5-46 Locate the centroid of the shaded area shown in each of the following figures.
A B Example 9-128 Blocks A and B of Fig. P9-128 have 20 - and 50 - kg masses, respectively. The static coefficients of friction between blocks A and B and between block B and the horizontal surface are 0.25. The static coefficient of friction between the rope and the fixed pegs is 0.20. Determine the force P required to initiate motion of block B. Pmin=414 N