I. The objective of this lab is to compare an exgerimental value for acceleration due to gravi with the actual value of acceleration due to gravigf ll. Apparatus (Equipment): stopwatch, measuring tape. |l|. Procedure: A small ball was dropped from rest from five marked points of a building that were 100m 80 m, 60 m, 40 m, and 20 m above the flat ground at the bottom of the building. The times the ball took to fall were measured using a stopwatch. IV. Raw Data: The distances (heights) above ground and falling times are indicated in the raw data indicated below DistanceIHeight (m) Falling time [s] Acceleration (ml?) 100 4.68 80 4.15 V. DATA ANALYSIS: (1)Using motion equations and showing your steps , calculate the acceleration of the ball for each row in the above table. You will get a total of five accelerations. (2} Determine the average of the five accelerations. The average acceleration will be the Experimental Acceleration. Usually it is denoted by the letter E (E is used to indicate that it is an experimental acceleration]. The Actual Acceleration is denoted bv the letter A . The actual free fall acceleration on Earth is A =9.8 mils2 Percent error =(Actual-Experimental)/Actual X 100% = (A-E)/A X 100% (3) Calculate the percent error between the value you obtained for experimental acceleration (E ) and the actual acceleration A= 9.8 m/s2 VI. QUESTIONS: 1. If this experiment is done on the Moon, will the ball's falling times increase or decrease ? Why ? 2. Using the data from the first-row, calculate the final velocity (V.) of the ball just before it strikes the ground.3. If the ball was a large plastic ball having a large surface area and air resistance was considered, will the falling times indicated on the table increase or decrease? Explain VII. Sources of Error: What are the possible sources of error for this experiment? VIII. Conclusions: Write down your conclusions In your conclusions describe if you achieved your objectives and what you have learnt from the experiment