In the next video Walter Lewin demonstrates that the golf ball
hits an object which is in a free vertically fall
when the golf ball was launched from the device pointing
at the object at the moment that it started its free fall.
The object starts its free fall from a height
h with respect
to the height of the position where the golf ball is launched
at a horizontal distance d.
Those initial conditions are expressed by
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v0
=
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(
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)
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=
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(
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)
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with
tan(θ) = h/d
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