G? Unit 5 Gravitational Forces & Fields ii. Justify why the magnitude of the net force exerted on Moon B could be larger than the magnitude of the net force exerted on Moon A. (c) Derive expressions for both of the following quantities. Express your answers in terms of mg, mp, R A, RB, and physical constants, as appropriate. 0 The net force F A exerted on Moon A - The net force F13 exerted on Moon B (d) i. Could the expressions in part (c) support your reasoning in part (b)(i) ? _ Yes _ No Explain your reasoning. ii. Could the expressions in part (c) support your reasoning in part (b)(ii) ? Yes No Explain your reasoning. Page 10 of 10 AP Physics 1 Unit 5 Gravitational Forces & Fields 18. This question is a long free-response question. Show your work for each part of the question. Planet MogA Mg B \\ __ 53 ___ @ ________ ____ x 9 I RBol kRAa Note: Figure not drawn to scale. (12 points, suggested time 25 minutes) Two identical moons, Moon A and Moon B, orbit a planet. The mass m0 of each moon is significant, but less than the mass m1) of the planet. At some point in their orbits, the planet and the two moons are aligned as shown in the figure. (a) The following dots represent the two moons when they are at the locations shown in the previous figure. On each dot, draw and label the forces (not components) exerted on Moon A and on Moon B. Each force must be represented by a distinct arrow starting on, and pointing away from, the appropriate dot. Moon A Moon B (b) Consider the net gravitational force exerted on each moon due to the planet and the other moon. i. Justify why the magnitude of the net force exerted on Moon A could be larger than the magnitude of the net force exerted on Moon B. AP Physics 1 Page 9 0f 10