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# A Purpose to Find the Gravity of Earth

PURPOSE The purpose of this lab was to find that gravity of Earth is indeed 98 mss the theory placed by Galileo THEORY The theory according to Galileo is that two objects have the same acceleration if dropped from the same height will land at the same time at the speed of 98 mss as long as there is no air resistance To have an understanding Galileos theory of acceleration certain terms and equations must be known Acceleration is defined as the change in velocity divided by the time interval which the change of velocity was measured Velocity is defined as the change of position distance divided by the time interval that the position was measured by The most basic formula used in this lab and in most of physics is the formula for velocity this formula is defined as velocity change in distance divided by the change in time v dt The basic metric units for this equation will be ms Another formula used is the formula used to find acceleration this equation is as follows acceleration change of velocity divided by the change in time a vt The basic metric unit used with this equation are mss Gravitys most common law for gravity is known as the constant acceleration of force on any objects no matter what the size or shape only if there is no wind resistance PROCEDURE The first step in this lab is to take the ticker timer the ticker tape and the object being tested and put these objects nearby When cutting the ticker tape make sure to cut a long enough piece so that it will touch the ground when at the height it will be dropped at Put the ticker tape into the timer making sure there is carbon paper on the timer to make the marks Then tape the object to the ticker tape

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