Question: Here's a short story: Rubbing your finger across a trackpad is very easy, but rubbing it across a piece of sandpaper results in high friction. Which surface will let you rub your finger a greater distance? (A) trackpad (B) sandpaper.  What is the most sensical answer between "trackpad" and  "sandpaper"?
Answer: trackpad

Question: Here's a short story: A boulder rolling down a rugged hillside experiences more friction then one rolling down a clearcut hillside. This means the boulder can reach a higher top speed across the (A) rugged hillside (B) clearcut hillside.  What is the most sensical answer between "rugged hillside" and  "clearcut hillside"?
Answer: clearcut hillside

Question: Here's a short story: Katy noticed that riding her skateboard on a ramp created less resistance than riding it up a hill. Riding her skateboard on _____ creates more heat (A) ramp (B) hill.  What is the most sensical answer between "ramp" and  "hill"?
Answer:
hill