HILL DESIGN ACTIVITY
Stand on the edge of a cliff and throw a ball horizontally. It
would travel as shown below.
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
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.
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Author: Tony Wayne
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