Astrology makes much of the position of the planets at the moment of one's birth. The only known force a planet exerts on Earth is gravitational. Use G = 6.674 X 10 _11 N [[12 [kg to answer below questions. a. Calculate the gravitational force exerted on a 4.47-kg baby by a 100-kg father 0.200 m away at birth {he is assisting, so he is close to the child}. Pg: x10'7N b. Calculate the force on the baby due to Jupiter [mJ = 1.9 X 1027 kg) if it is at its closest distance to Earth, some 6.29 x 1011 m away. F9: x105N Other objects in the room and the hospital building also exert similar gravitational forces. {Of course, there could be an unknown force acting, but scientists first need to be convinced that there is even an effect, much less that an unknown force causes it.)