Tape a yardstick to a wall or door. This will be our frame of reference for the exp innot tape it to the ed a second person to assist you by holding the yardstick against the wall. Bend down so your eyes are level with the 12 inch mark on the ruler. Drop the ball from 12 Inches and record how high the ball bounces. Repeat this 3 more times at the 12 inch height. Move up to the 24 inch mark. Drop the ball from 24 inches and record how high the ball bounces. Repeat this 3 more times at the 24 inch mark. Move up to the 36 inch mark. Drop the ball from 36 inches and record how high the ball bounces. Repeat this 3 more times at the 36 inch mark. Compute an average for each height and record it in the data table. To compute and average you will add the four ince heights for 12 Inches and divide the sum by 4