Experiment # 4: The Acceleration Due To Gravity Introduction: The discovery of gravity goes back much further than Newton's time. What Newton discovered was that gravity is universal that is not limited to the earth only. Newton, however, reasoned a force on the planets must be perpendicular to their motion, directed toward the center of their curved paths toward the sun. This was the force of gravity, the same force that pulls apples from trees. In this lab we are going to measure the acceleration due to gravity and from that we can find the force due to gravity on any object setting at the surface of the earth. Objective: To purpose of this lab is to measure the acceleration due to gravity g and to use g to find the Earth's mass. Required Equipment and supplies: A small ball, measuring tape, Stopwatch and calculator. Procedure: 1. Drop a ball from a height that is not so high to avoid air resistance build up and not so low to affect the time measurement because of reaction time using the stop watch. 2. Measure the height in meters and record it in table 1. 3. Measure the time of the fall