Practice problems 3. When the Moon is directly overhead at sunset, the force by Earth on the Moon, FEM, is essentially at 90 ° to the force by the Sun on the Moon, FSM, as shown below. Given thatFEM 1.98 1020 N and FSM= 4.36 × 1020 N, all other forces on the Moon are negligible, and the mass of the Moon is 7.35 × 1022 kg, determine the magnitude of the Moon's acceleration. FEM = Moon F SM
​