# UNITS1 - Examples we have encountered so far are Force 1 N...

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UNITS I SAR Physics A M Kolchin This is a first handout summarizing the units we have been using so far. I will have subsequent handouts on units as we introduce new quantities into the course such as energy etc. We will be using S.I. units unless otherwise indicated. Physical Quantity S.I. units Time seconds (s) Length, distance, displacement vectors meters (m) Speed, velocity vectors m/s Acceleration vectors m/s 2 Mass kg Force vectors , Weight newtons (N) Pressure pascals (Pa) Fundamental Units are basic units such as meters, seconds, and kilograms which can't be expressed in terms of more fundamental units. Derived Units are units that can be expressed in terms of the fundamental units.
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Unformatted text preview: Examples we have encountered so far are: Force: 1 N = 1 kg m/s 2 ; This comes from Newton's 2 nd Law which can be expressed as: F (net) = m a. Pressure: 1 Pa = 1 N / m 2 ; This comes from the definition of pressure as being the force exerted on an object divided by the area over which the force is applied. (That is, P = F/A where A = area with units of m 2 .) For units of force and weight, we have seen pounds. 1 newton EQUALS .22 pounds. 1 kilogram WEIGHS 2.2 pounds. (You will not have to memorize these relationships.)...
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## This note was uploaded on 10/19/2011 for the course PHY 2020 taught by Professor Staff during the Spring '08 term at University of Florida.

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