Alexa observed that a block took 5 seconds to slide down Ramp A and 2 seconds to slide down Ramp B. Both ramps were at the same angle. Which statement is the most likely explanation?
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Worked Solution
Step 1: A longer time taken to slide down implies the block was moving slower.
Step [2-9]: Lower speed on Ramp A suggests a higher frictional force opposing motion.
Step [2-9]: Rougher surfaces exert more friction.
Correct answer: Ramp A has a rougher surface than Ramp B.
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