Choose between "barn floor" and "field". Question: A halter sliding across a barn floor gets hotter then one sliding across a field. Which surface forces the halter to travel at a lower rate of speed? (A) barn floor (B) field
barn floor

Choose between "railway" and "track". Question: The conductor switched his train to the railway for a faster ride. This is because the track is (A) less friction (B) more friction.
track

Choose between "blue marble" and "green marble". Question: Dennis is rolling two marbles down the sidewalk. He rolls them both at the same time, in the same way. The blue marble goes a longer distance down the sidewalk than the green one does. The faster marble is (A) green (B) blue
green marble