Jun Jie tested three different surfaces by sliding a block down a ramp. He measured the time taken for the block to reach the bottom. Which surface resulted in the longest time?
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Worked Solution
Step 1: Friction opposes the motion of the block sliding down.
Step [2-9]: Higher friction results in a slower speed and a longer time to travel.
Step [2-9]: Sandpaper is the roughest surface with the highest friction.
Correct answer: Surface B (Sandpaper)
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