Siti released a toy car from the top of a ramp. She changed the surface of the ramp for each trial and measured the distance travelled by the car. Which surface would likely result in the car travelling the SHORTEST distance?
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Worked Solution
Step 1: Distance travelled depends on the friction between the car and the surface.
Step 2: Rougher surfaces provide more frictional force, which opposes motion.
Step 3: Sandpaper is the roughest surface listed.
Step 4: More friction causes the car to slow down faster, resulting in the shortest distance.
Correct answer: Sandpaper
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