Using data for various intersections in the community, students also determine whether the duration of the yellow light in each case is sufficient to allow vehicles travelling at the prescribed limit to pass through the intersection. Students drop balls of various mass and size from the same height to study their motion and the effects of air resistance. Stand up two pennies on a desk, one on the edge and one behind it and slightly off to one side. Flick the second penny with your finger, so that as it flies off the table, nudging the first penny off at the same time. Observe the resulting motion of the two pennies and the time they are in the air.
Students compare the motion of the two pennies.
In groups, students design problems involving kinematic concepts they have studied. Have them include detailed keys for their problems. Groups can then exchange problems to test each other. Students could use small rockets or build pop-bottle rockets and analyse their motion when fired vertically. As students solve projectile problems, ask them to assess their own problem-solving abilities.