Siti pushed a wooden block across four different surfaces with the same amount of force. The distance moved by the block was recorded in the table below. Which surface is likely the roughest?
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Worked Solution
Step 1: Friction opposes motion between two surfaces in contact.
Step 2: A rougher surface exerts more frictional force on the block.
Step 3: More friction results in a shorter distance moved before the block stops.
Step 4: Surface C has the shortest distance (8 cm), making it the roughest.
Correct answer: Surface C (8 cm)
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