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: Identify that a longer time means the block moved slower.
Step 2: Slower movement is caused by a greater frictional force opposing the motion.
Step 3: Frictional force increases with the roughness of the surface.
Step 4: Sandpaper is the roughest material among the options, creating the most friction.
Correct answer: Sandpaper
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