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Four particles have the following masses and (x, y) coordinates: 4.0 kg (4, -12.5); 3.0 kg (4, 6); 2.0 kg (8, -3); and 1.0 kg (6, -2). The (x, y) coordinates of the center of the mass of these particles are: O (2, 3) O (4, 3) O (-2, 3) O (5, -4) O (-3, 5)Two bodies, A and B, have equal kinetic energies. The mass of B is 40 times that of A. What is the ratio of the momentum of B to that of A is? Please round your answer to two decimal places.A 0.70 kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 32.0 m/s and rebounds up at 16.3 m/s. The duration of contact between the ball and the sidewalk is 0.008 s. What is the magnitude of the average impact force, in N, on the ball? Please round your answer to the nearest whole number (integer)