1. A 2500-lb tow-plane tows a 500-lb sailplane (no engine) with a tow cable (ignore weight of cable). In the following, ignore friction between the tires and the runway as well as wind resistance. a) Starting from rest, what constant acceleration in ft/s is required for the planes to attain a take-off speed of 70 mph after traveling 2000 ft on the runway? (10 pts) b) Assume the required acceleration is 3.2 ft/s. What is the required forward thrust T (i.e., force) that the tow plane engine must provide? What is the tension in the tow cable? (10 pts) Assume the thrust is 250 lb and after 30 s the planes have reached a speed of 80.5 ft/s. What is the net power in horsepower (hp) that the engine must provide at that instant in time? (10 pts) Sail plane * Tow Plane Tow cable fil 2000 777 Not to scale