Newtonian Mechanics Motion of particles, animals, baseballs, rockets, planets ga

Newtonian Mechanics Motion of particles, animals, baseballs, rockets, planets ga www.phwiki.com

Newtonian Mechanics Motion of particles, animals, baseballs, rockets, planets ga

McDonald, Jerry, Football Columnist has reference to this Academic Journal, PHwiki organized this Journal Newtonian Mechanics Motion of particles, animals, baseballs, rockets, planets galaxies, etc Limitations Good at all “practical scales” Must use Quantum Mechanics at very small scales (x p ~ h) Must use Relativity at velocities nearing the speed of light in addition to at high gravity Chapter 1: Units in addition to Measurement Physics involves measured quantities What goes up must come down But how high does it go Measured Quantities Must be expressed in units Are always uncertain Units Basic Units – Systeme Internationale (SI) Length – Meter – (m) Mass – Kilogram – (kg) Time – Second – (s) Other Units Length – mile, inch, yard, foot, kilometer, Mass – gram, milligram, microgram, slug, (a pound is a unit weight not a unit of mass) Time – minute, hour, day, week, year,

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Metric Prefixes femto = 10-15 = f pico = 10-12 = p nano = 10-9 = n micro = 10-6 = m milli = 10-3 = m centi = 10-2 = c deci = 10-1 = d deka = 101 = da hecto = 102 = h kilo = 103 = k Mega = 106 = M Giga = 109 = G Tera = 1012 = T Peta = 1015 = P Examples 1 millimeter = 1 mm = 0.001 meter 1 kilogram = 1 kg = 1000 grams 1 centiliter = 1 cL = 0.01 Liters 1 Megawatt = 1 MW = 1,000,000 Watts Units in Calculations When multiplying in addition to dividing, treat units like algebraic variables (10kg)(15s)/(5m x 10m) = 3 kg-s/m2 = 3kg·s/m2 When adding in addition to subtracting, units must be the same 10m + 5s “Units are your friend” = 49 m2/s2 = 7.0 m/s = (10×15/(5×10))(kg x s/(m x m)) = undefined Unit Conversions 180 cm = m Conversion Factor: 1 cm = 0.01 m 0.01m/1cm = 1 180 cm = 180 cm = 1.80 m 5.0 mg = kg Conversion Factors: 1 mg = 0.001g 1kg = 1000g 0.001g/1mg = 1 1kg/1000g = 1 = 0.0000050 kg = 5.0 x 10-6 kg x 1 (0.01m/1cm) 5.0 mg = 5.0 mg x 1 (0.001g/1mg) x 1 (1kg/1000g)

Unit Conversions 2.40 cm2 = m2 Conversion Factor: 1 cm = 0.01 m 0.01m/1cm = 1 2.40 cm2 = 2.40 cm2 65 mile/hour = m/s Conversion Factor: 1 hour = 60 min 1 min = 60 s = 29 m/s x 1 (0.01m/1cm) 65mile/hour (1.61km/mile) (1000m/km) (hour/60 min) 2 ((0.01)2m2/1cm2) = 0.000240 m2 = 2.40 x 10-4 m2 1 mile = 1.61km 1km = 1000m 1 = 1.61km/mile 1 = 1000m/km 1hour/60min = 1 1 min/60s = 1 (1 min/60s) Uncertainties All measured quantities are uncertain The best way to indicate an uncertainty is with an uncertainty estimate 8.5 0.3 cm means between 8.2 in addition to 8.8 cm In the lecture portion of this class we will use significant figures Usually, the last reported digit is a rough indication of uncertainty 8.5 the 5 is uncertain 2 significant figures Significant Figures How many significant figures are there 1. Count from the first non-zero digit on the left to the last non-zero digit on the left 0.00400200 at least 4 significant figures 2. If there is a decimal point then the zeros on the right are counted 0.00400200 6 significant figures 3. If there is not a decimal point then the zeros on the right may or may not be counted 5000 could be 1, 2, 3 or 4 significant figures In Haliday, Resnick in addition to Walker all zeros on the right are counted 5000 is 4 significant figures 4. In scientific notation, all the digits to the left of the 10x are significant 5 x 103 1 significant figure 5.0 x 103 2 significant figures 5.01 x 103 3 significant figures

How many significant figures should there be reported in a result The number of significant figures is determined by measuring process. Multiplication in addition to Division Direct Measurement The number of significant figures is determined by the least precise of the factors in addition to divisors (precision = number of significant figures) The result should be rounded off to the same number of significant figures as the least precise factor or divisor 2.000 x 5.00/15.00 = 0.6666666 2.000 4 sig figs 5.00 3 sig figs 15.00 4 sig figs Should be rounded to 3 significant figures 0.667 Addition in addition to Subtraction The result should be rounded off according to the number whose smallest significant digit is largest 10.3 + 0.17 = 10.47 7 is in the hundredths place 10.5 1,000,000.0 – 999,999.873 = 0.127 0 is in the tenths place 3 is in the thous in addition to ths place 3 is in the tenths place Round off to the tenths place 0.1 Round off to the tenths place

McDonald, Jerry Tri-Valley Herald Football Columnist www.phwiki.com

McDonald, Jerry Football Columnist

McDonald, Jerry is from United States and they belong to Tri-Valley Herald and they are from  Pleasanton, United States got related to this Particular Journal. and McDonald, Jerry deal with the subjects like Football; Sports

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