Model that against time speed and gravity

harry12
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Homework Statement


against time speed gravity


Homework Equations



no

The Attempt at a Solution



to slow down the marble reach bottom

model saiz is 300x300 height is 700
 
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That makes no sense at all. Please state as clearly as you can what the problem is.
 
a ball run project but have to make the longest time reach bottom
 

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