The average distance from Earth to the Moon is 384,400 km. If the average distance from Earth to the Moon was increased to 768,800 km, how would the gravitational force exerted by Earth upon the Moon be affected? Choices:
1) It would be half of the original force.
2) It would be a quarter of the original force.
3 It would be twice the original force.
4) It would remain the same force.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants