Siti released a wooden block from the top of a ramp. She noticed that the block moved slower when the ramp was covered with sandpaper compared to when it was smooth wood. Which of the following explains her observation?
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Worked Solution
Step 1: Identify the surface change (sandpaper vs smooth wood).
Step 2: Sandpaper is a rougher surface than smooth wood.
Step 3: Friction is a force that opposes motion and is greater on rougher surfaces.
Step 4: Higher friction slows the block down more.
Final Answer: Sandpaper has more friction than smooth wood.
Correct answer: Sandpaper has more friction than smooth wood.
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