12. A rock of mass 820 kg in outer space has a velocity of (68.0, 0, -93.0) m/s at a certain instant when it passes by an asteroid. At this instant, the gravitational force that the asteroid exerts on the rock is (2450, 0, 6600) N. What is new velocity of the rock 50 seconds after this instant (assuming the force is approximately constant)? A. '6.20 x 10,0, -433 x 104 big m /s B. (82.9, 0, -52.8) m/s C. (71.0, 0, - 85.0) m/s D. (82. 9, 0, 133.2) m/s E. (110.9, 0, -50 1) m/s