Karteikarten
Physics chapter 1
Karten in diesem Stapel (25)
- 1System of units for Lengthsi metric unit = Meter (m)
cgs metric unit = Centimeter (cm)
US customary unit = Foot (ft) - 2System of units for Masssi metric unit = Kilogram (kg)
cgs metric unit = Gram (g)
US customary unit = Slug (slug) - 3System of units for Timesi metric, cgs metric, and US customary units are all Seconds
(s) - 4System of units for Temperaturesi metric unit = Kelvin (K)
cgs metric unit = Degrees Celcius (°C)
US customary unit = Degrees Fahrenheit (°F) - 5Powers of TenOnly really need to memorize nano-, micro-, mili-, centi-, and kilo-
- 6Useful conversions- 2.54 cm = 1 inch
- 1 m = 3.28 ft
- 1 kg weighs about 2.2 lbs - 7Signifcant figures rule for # of Significant Figures ≠ # of Decimal places- Trailing zeros don’t count: 8200 = 8.2 × 103(2 sig.fig.)
– Leading zeros don’t count: 0.00602 = 6.02 × 10−3 (3 sig.fig.)
– In a number with a decimal point, trailing zeros are significant 0.60200 (5 sig.fig.) - 8Signifcant figures rule for multiplication, division, roots– Least # of significant figures used in calculation.
– 3.73×5.7=21.261=21 - 9Significant figures rule for addition and subtraction– Least # of decimal places
– 4.5-1.22=3.28=3.3
– 200-35.2=164.8=165(No decimal place in 200) - 10What are the 3 Trig functions for the Pythagorean’s Theorem?- sin theta = O/H
- cos theta = A/H
- tan theta = O/A
- 11What is the Pythagorean's Theorem equation?𝐴2 + 𝑂2 = 𝐻2
- 12The combination of an origin and an axis marked in both the positive and negative directions makes a What?Coordinate system
- 13How to specify a positionNeed a reference point (the origin), a
distance from the origin, and a direction from the origin. - 14A physical quantities that are described by their magnitudeScalars
- 15Vectors-A quantity described by magnitude + direction.
- Arrow direction = vector direction
- Arrow length ~ magnitude of the vector
- 16What is the definition of distance in using vectors?Total length of the path
- 17What is displacement in vectors?Shortest distance between the two points.
Equation: - 18For 1- dimensional vectors direction can be described with what?“+” and “-“
- 19What are the other ways to indicate direction?• length and angle
• magnitudes and unit vectors - 20Step by step vector additionAdd vectors 𝐴 and 𝐵:
1. Draw𝐴
2. Place the tail of B at the tip of A
3. Draw an arrow from the tail of A to the tip of B. This the vector A + B.
- 21Step by step vector subtractionSubtract vectors A and B:
1. Draw A
2. Place the tail of -B at the tip of A
3. Draw an arrow from the tail of A to the tip of -B. This is the vector A - B.
- 22Multiplication by Scalar
- 23Vactor additon equations for A from (A + B = R)- Ax = +Acos𝜃
- Ay = +Asin𝜃 - 24Vector addition equations for B from (A + B = R)- Bx = +Bcos𝜑
- By = −Bsin𝜑 - 25Vector addition equations for R from (A + B = R)Rx =Ax +Bx = Acos𝜃 + Bcos𝜑
Ry = Ay +Bx = Asin𝜃 −Bsin𝜑
|𝑅|=𝑅=𝑚𝑎𝑔𝑛𝑖𝑡𝑢𝑑𝑒= Square root of(Rx^2+Ry^2)
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- Karteikarten am Physics chapter 1, erstellt von Ashleigh McDevitt am 19/09/2024.
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- Ashleigh McDevitt
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