Electricity, Magnetism, Gravity

• Recall electric forces are similar to gravitational forces

• Electrostatic FE = K q1q2 / R2 (Coulomb’s Law)

• Gravity: FG = G m1m2 / R2 (Newtons Law)

• The same questions apply to gravity: Do gravitational forces act instantaneously between two bodies?

  • This was a problem for Newton!

• Are there gravitational fields?

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