A ladder of length L is shown below leaning against a smooth wall. Suppose that the ladder is uniform and has a weight of 300 N. How large a friction force must exist between the ladder and the ground to keep the ladder
stationary? What is the minimum coefficient of friction required?

Modify the equation fδt=δ (mv) to find the force of friction.

Which type of basaltic lava flow has a fairly smooth

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.