III. PROCEDURE: 1. Choose an elevated place, preferably a building where you can drop an object from the top. 2. Using a string, get the height of the building. The height should be the separation from where you intend to drop the metal ball and the ground. That will be the dy. 3. Drop the metal ball. Record the time as to when the ball reaches the ground. 4. Calculate the value of g using the equation dy = gt2/2. 5. Drop the ball three times. Trials Height (dy ) in Time (t) in second Acceleration due to gravity ( g) meter 2 3 AverageIV. ANALYSIS: 1. What are the factors that affect the rate of fall of the ball? 2. How will you describe the calculated value of acceleration due to gravity? 3. What factor/s make/s an object fall/s freely? VI. APPLICATION: 1. Skydivers stretch their arms after jumping off the plane. What do you think is the main reason for doing so? 2. Does the mass of an object have an effect on objects falling freely? VII. ENRICHMENT ACTIVITY: Problem Solving Solve the following problems correctly and neatly. 1. A rock that is initially at rest is dropped from a building. It takes 4.0s for the rock to hit the ground. Determine the height of the building. 2. A coin is thrown down into the wishing well with an initial downward speed of 2.8 m/s. The coin hits the bottom 1.5s later. (a.) How deep is the well? (b.) What is the coin's speed as it hits the bottom of the well