A fancy way to convert from one unit to another

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Presentation transcript:

A fancy way to convert from one unit to another Dimensional Analysis A fancy way to convert from one unit to another

Lots of times in Physics, we are given measurements in one type of units and we have to convert to another. For example, my doctor measures my mass in kilograms, but at home I measure in pounds. I want to know if my scale at home and the one at the doctor’s office are the same. How could I compare the two?

Dimensional Analysis! Stop this video frequently to take notes in your notebook. Make sure you understand how to do this…

Problem 1 Suppose a 7th grader is running down the hall at 6.8 feet per second. How fast would you have to run in miles per hour to keep pace with this kid? (hint, there are 5,280 feet in 1 mile) Copy this problem (including the words) into your notebook, pull out your calculator, and work together to solve this…

Problem 1 Did you calculate 6.8 x 1 x 60 x 60 = 24480 1 x 5280 x 1 x 1 = 5280 or 4.64 miles/ hour ?

Problem 2 How many seconds are there in 1 year?

Problem 2 Did you calculate 60 x 60 x 24 x 365 = 31,536,000 seconds in a year?