PHYS 121 Chapter Notes - Chapter 9: Dark Matter, Gravitational Constant, Weightlessness
6 Oct 2017
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Every body in the universe attracts every other body with a force that, for two bodies, is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Gravity and distance: the inverse-square law (9. 3) A law that relates the intensity of an effect to the inverse square of the distance from the cause. gravity follows an inverse-square law, as do the effects of electric, magnetic, light, sound, and radiation phenomena. Weight and weightlessness (9. 4) always, due to the force of gravity. Gravitational force is weaker with increase distance. The sun"s pull on earth is 180 times greater than the moon"s pull than half as effective as the moon in raising tides. The reason is because the sun has a greater distance. The influence that a massive body extends into the space around itself, producing a force on another massive body. measured in newtons per kilogram (n/kg)
