The paper touches the floor after the release. After each lab group has had a turn in the race, complete the data table. Make sure that calculations are correct. Record each group's rise time on the board. They will be evaluated by the rise time and the accuracy of calculations.
Extensions Draw a vector diagram of the forces involved in their balloon rise.
Calculate the speed of their balloon. Calculate a class average. Building Block of the Universe. Prentice Hall, 1994. Competition Event for 1990.