By Rebecca Harvey
Purpose: The purpose of the lab is to test how the height that a ball was dropped from would affect the bounce of that ball.
Independent Variable: The independent variable is the initial height (in ft) that the ball was dropped from. We chose this because it was easy to control and regulate.
Dependent Variable: The dependent variable is the highest point (in inches) that the ball bounced to. We chose this because it was easy to observe in its variations and use in calculations.
Controlled Variables: The dependent variables include the constant mass of the ball, constant conditions (no wind, even floor)
Summary: In this experiment, we set up a meter stick against a wall, so that the measurements would be accurate. We marked the heights that we were dropping the ball from (1 ft, 2 ft, 3 ft, 4 ft and 5 ft). We then held the ball at those marked heights and dropped it, without throwing it or using any sort of force. We carefully observed how high the ball bounced at each height and recorded it.
Photos:
Graph:
Analysis:
Verbal Model: As the height in feet increases, the bounce in inches increases proportionally.
Math Model: Bounce = 6.6 inches/feet (height) + 0.9 inches
Slope: For every 1 foot in height, the bounce increases by about 6.6 inches.
Y-intercept: When the ball is dropped from 0 ft above the ground (a.k.a. the ball is not dropped at all) it bounces about 0.9 inches. This data is significant enough to be problematic, meaning that our data is probably off. excellent work!
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