Siti released a wooden block from the top of the ramp shown below. She repeated the experiment using different materials for the ramp surface. On which surface would the block take the LONGEST time to reach the bottom?
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Worked Solution
Step 1: Identify the relationship between friction and speed. Higher friction slows down movement.
Step 2: Compare the textures. Sandpaper is a rough surface compared to glass or polished wood.
Step 3: Rougher surfaces create more friction between the block and the ramp.
Step 4: More friction means a slower speed, resulting in the longest travel time.
Correct answer: Sandpaper
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