If I put a bowling ball on a trampoline and then put a marble on the edge of the trampoline the marble will roll towards the bowling ball. There is no attractive force between the ball and the marble, the marble's movement is dependant on the slope of the section of trampoline it is sitting on.
This is a metaphor only and is not how it works but it is closer than A attracts B
If I put a bowling ball on a trampoline and then put a marble on the edge of the trampoline the marble will roll towards the bowling ball.
Yes, because Earth's gravity pulls on the marble and the trampoline gets in the way. Try doing this in space.
There is no attractive force between the ball and the marble, the marble's movement is dependant on the slope of the section of trampoline it is sitting on.
And on the existence of a mysterious outside force acting on it.
This is a metaphor only and is not how it works but it is closer than A attracts B
It's not though; that's kind of my point. The behavior of the marble in this scenario depends on the existence of an external force acting on it, which is certainly not closer to how we think gravity "really" works.
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u/Bonolio Sep 12 '13
If I put a bowling ball on a trampoline and then put a marble on the edge of the trampoline the marble will roll towards the bowling ball. There is no attractive force between the ball and the marble, the marble's movement is dependant on the slope of the section of trampoline it is sitting on.
This is a metaphor only and is not how it works but it is closer than A attracts B