Astuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 meters. if the toy falls off the bed, what will its kinetic energy be at a height of 0.500 meters? (ignore frictional effects.) 0.0 j 2.9 j 4.4 j 7.3 j

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?