A stuffed monkey is suspended from a rod at one end of a lecture hall by an electromagnet. Aiming directly at the monkey with a golf ball gun, we find that gravity accelerates all objects downward at the same rate [video: buff.ly/3el3kTw] [more: bit.ly/2eTnIxr]
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The residents of Hartlepool are particularly interested in the calculations required here ...
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One of the memorable highlights of Prof Pierre Piroué’s Physics 103 lectures at Princeton, 1977.
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Gravity pulls both objects down by distance s = 1/2 * g * t^2. Only variable part is time t, which is the same for both objects, so they always hit each other.
