Two examples of frictions in statics.
Example 1: uniform crate shown in Fig. 8—7a has a mass of 20 kg. If a force
P = 80 N is applied to the crate, determine if it remains in equilibrium.
The coefficient of static friction is = 0.3.
Example 2: The 80-kg crate has its center of gravity at G. Determine the smallest force P that will initiate motion if (θ = 35°).
