Step 2: Our question — does the surface change how far a ball rolls? To be fair, change only ONE thing.
Change: the surface. Measure: how far the ball travels. Keep the same: the ball, the push, the starting point.
Presentation page 3
Step 2: Our question — does the surface change how far a ball rolls? To be fair, change only ONE thing.
Change: the surface. Measure: how far the ball travels. Keep the same: the ball, the push, the starting point.