You are on the roof of the physics building, 46.0 m above the ground (figure 1). your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. if you wish to drop an egg on your professor's head how far from the building should the professor be when you release the egg? assume that the egg is in free fall. 460 m e 1.20 ms 1.80 m 2. a lunar lander is descending toward the moon's surface. until the lander reaches the surface, its height above the surface of the moon is given by y(t)-b-ottdt, where b= 800 m is the initial height of the lander above the surface, c = 60.0 m/s , and d-1.05 me (a) what is the initial velocity of the lander, at t 0 (b) what is the velocity of the lander just before it reaches the lunar surface?