Apple QuickTime movie | 1995-07-24 | 17.0 MB | 512x276 | 30fps | 3 minutes, 23 seconds
Transcription: Now let's think about gravity's effects on things near the Earth. Me, for example. The gravitational force on me is my weight. We have two ways to express the gravitational force on me. From Newton's second law, F equals M times G, and from universal gravitation, F equals G times M times M divided by R squared. By getting these equal, we find m times g equals g times m times m divided by r squared. So, g equals g times m divided by r squared. I would weigh less if I went on a diet and lost mass or the earth had less mass was on the moon or I was farther from the earth. Up on the roof I actuall ...
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