Adriver drives for 30.0 minutes at 80.0 km/h, then 45.0 minutes at 100 km/h. she then stops 30 minutes for lunch. she then travels for 30 minutes at 80 km/h. (a) sketch a plot of her displacement versus time and speed versus time. (b) calculate her average speed

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.