HILL DESIGN ACTIVITY
Stand on the edge of a cliff and throw a ball horizontally. It
would travel as shown below.
![](HOME1.GIF)
Because the two paths are the same, it stands to reason that the
roller coaster car would also be weightless as it travels down the
hill.
HILL
DESIGN: ACTIVITY
1
Hold a large piece of plywood at a 60° angle to the
floor. Roll a WET tennis ball horizontally across the top of the
board. Look at the water trail it left behind. Roll a WET tennis ball
FASTER horizontally across the top of the board. Look at the new
water trail it left behind.
Draw the results below.
![](HOME2.GIF)
If you use or find this page useful or have any
comments, please contact the author so maybe he'll do more.
Author: Tony Wayne
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