25) G is ( 1.5pts extra credit) 9.81/5^2 6.67 X10^-11 N 0 9.8 m/s 6.67 X10^-11 Nm^2/kg^2 26) The speed needed to leave earth's gravity is (@ 1.5pts extra credit) the speed of sound. O the escape speed the terminal speed. 0 9.8m/512 27) The tension in the string for a single pulley system with a 2kg mass hanging on both sides is ( 1.5pts extra credit) D 0 Newtons 19.6 Newtons O 2 Newtons O between 2Newtons and 3Newons 28) The tension in the string in a single pulley system with 4kg on one side and 5kg on the other is 1.5pts extra credit) more than 49 Newtons 39.2 Newtons between 39.2 Newtons and 49 Newtons. between 4 Newtons and 5 Newtons 29) The gravitational force between two objects (@ 1.5pts extra credit) Falls off with distance^2 between objects. O increases with the distance between objects. is independent of the distance between objects. falls off with mass of the objects