Siti released a wooden block from the top of a ramp. She repeated the experiment by covering the ramp with different materials. Which material will likely result in the block taking the LONGEST time to reach the bottom?
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Worked Solution
Step 1: Friction opposes motion and slows down objects.
Step 2: Rougher surfaces produce more frictional force.
Step 3: Sandpaper is the roughest material listed, so it will create the most friction and slow the block down the most.
Correct answer: Sandpaper
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