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Unformatted text preview: Physics concepts for Math 116 Here are, I think, all the physics concepts we will use in Math 116 this term. I wont do them justice, of course; you should take Physics 140 for that. This is just a vocabulary cheat-sheet. Ive included units for all the quantities, in both metric and English flavors. One of the best tricks the physicist has is to keep track of the units during a calculation. Its a great way to check that your answer makes sense, and it catches a lot of mistakes. It helps a lot to be familiar with the conversions, especially the metric-to-metric conversions, like 1 N = 1 kg m/s 2 . There are, of course, many more units for each quantity. Ive just given a couple. I recom- mend the site http://www.onlineconversion.com/ if you want to convert units. Time Metric units: English units: seconds (s) seconds (s) Conversions: None needed Time you know. Length or Distance Metric units: English units: meters (m) feet (ft) Conversions: 1 m = 3.28 ft, 1 ft = .305 m, 1 in = 2.54 cm Length you know. One inch is exactly 2.54 centimeters. They redefined the inch to make that true. Area Metric units: English units: square meters (m 2 ) square feet (ft 2 ) Conversions: 1 m 2 = 10.8 ft 2 , 1 ft 2 = .0929 m 2 Area you know. Volume Metric units: English units: cubic meters (m 3 ), liter ( ) cubic feet (ft 3 ) Conversions: 1 m 3 = 1000 , 1 m 3 = 35.3 ft 3 , 1 ft 3 = .0283 m 3 Volume you know. 1 Velocity Metric units: English units: meters per second (m/s) feet per second (ft/sec) Conversions: 1 m/s = 3.28 ft/s, 1 ft/s = .305 m/s Velocity is how fast some length or distance is changing. Its signed; a positive value means the length is increasing, a negative value means its decreasing. Acceleration Metric units: English units: meters per second per second (m/s 2 ) feet per second per second (ft/s 2 ) Conversions: 1 m/s 2 = 3.28 ft/s 2 , 1 ft/s 2 = .305 m/s 2 Acceleration is how fast some velocity is changing. Positive if the velocity is increasing, negative if its decreasing. If an object falls near the Earth, it accelerates at a constant rate due to gravity. We call this acceleration g , and its equal to 9.8 m/ s 2 or 32 ft/s 2 ....
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- Winter '08