L02c - 1 8 Physics 111 Lecture 2c “I know that this...

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Unformatted text preview: 1 / 8 Physics 111 Lecture 2c “I know that this defies the law of gravity, but, you see, I never studied law.” –Bugs Bunny Free Fall Free Fall Equations Example Question Question Example 2 / 8 ■ Objects moving under the influence of only gravity are said to be in free fall ■ Before 1600, it was widely believed that heavier bodies fell faster than lighter bodies ■ Common sense seems to tell us that the speed of the fall of an object is proportional to how heavy it is ■ Galileo was the first to predict that falling bodies on earth would fall with a distance proportional to time squared ( D ∝ t 2 ) ■ Galileo surmised through repeated experiment that ◆ “at a given location on the Earth and in the absence of air resistance, all objects fall with the same uniform acceleration.” Free Fall 3 / 8 ■ Galileo felt that earlier work had neglected the effect that air resistance (friction) has on objects ■ The uniform acceleration Galileo was talking about was the acceleration due to gravity...
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L02c - 1 8 Physics 111 Lecture 2c “I know that this...

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