1. The height of a certain waterfall is 33.1 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?_______________ m/s2.On earth, two parts of a space probe weigh 15500 N and 8900 N. These parts are separated by a center-to-center distance of 10 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far from any other objects.__________________ N3.A projectile of mass 0.500 kg is shot straight up with an initial speed of 19.0 m/s. How high would it go if there were no air friction? _______ m