1 2 Trials Time (s) 3 Using the following materials: stopwatch, tennis ball (any ball), and long string, meter stick or tape measure or ruler, follow the following steps: Average a. On the second floor of your building. Drop the tennis ball b. Using the stop watch, ask your classmates to record the time it takes the ball to reach the ground Record your data on the table below. 4-0 Height (m) Computations d, = vit + }at c. Calculate the height of the building d. Using the data (average time and average velocity) from the table calculate the final velocity using the formula: a c. Using a very long string, get the actual height of the second floor of your school building f. Determine the accuracy error by using the equation: % error= difference between actual and experimental values actual values x 100%