Jun Jie tested how the amount of force needed to pull a block changed on four different surfaces. Which surface most likely exerted the MOST frictional force on the block?
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Worked Solution
Step 1: Frictional force is the force that opposes motion between two surfaces in contact.
Step 2: Rougher surfaces create more friction.
Step 3: Among the options, sandpaper is the roughest surface.
Step 4: Therefore, sandpaper exerts the most frictional force.
Correct answer: Sandpaper
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