Question: Choose between "road" and "dirt track". Question: Jake is driving his motorbike to a dirt track. The ride from his house on the road is easy, as the road offers little resistance. However, the dirt track offers a lot more resistance. Jake's motorbike will generate more heat on the (A) road (B) dirt track.
Answer: dirt track

Question: Choose between "wood floor" and "carpet". Question: Ross made everyone laugh when he slid across the wood floor in his socks. He tried doing it at his friends on a carpeted floor. He barely went an inch on the carpet, while he went feet on the wood floor. Ross would be making less heat against the (A) wood floor (B) carpet.
Answer: wood floor

Question: Choose between "brown carpet" and "granite kitchen countertop". Question: Timmy plays with his shiny new marble and observes that it requires more effort to make the marble roll across the brown carpet than it does for the marble to roll the same distance across the granite kitchen countertop. He concludes that (A) the brown carpet has more friction (B) the granite kitchen countertop has more friction
Answer:
brown carpet