Siti released a toy car from the top of a ramp. She recorded the time taken for the car to reach the bottom using three different materials for the ramp surface: Glass, Wood, and Sandpaper. Which of the following shows the correct order of materials starting from the one with the MOST friction?
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Worked Solution
Step 1: Identify the relationship between surface roughness and friction. Rougher surfaces produce more friction.
Step 2: Rank materials by roughness: Sandpaper (roughest) > Wood > Glass (smoothest).
Step 3: Match the order with the question requirement (most to least).
Correct answer: Sandpaper, Wood, Glass
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