Physics - 1.1 Intro to physics, units, unit conversion, sig figs

physics

study how how and why things work the way they do

math model

use to describe something we observe

mechanics

describe motion of objects

kinematics

equations that predict how things will move

dynamics

why things move the way we observe

particle model

used to describe objects

units

fundamental for describing quantities

SI units

kg (mass), m (distance), s (time)

sig fig rules

giga

10^9, G

mega

10^6, M

kilo

10³, K

centi

10^-2, c

milli

10^-3, m

micro

10^-6, µ

nano

10^-9, n

1 inch = ____ cm

2.54 cm

100 cm = ____ m

1 m

1 mile = ___ km

1.609 km

1 km = ____ m

1000 m

sig figs mult. and division

The answer should have the same number of significant figures as the factor with the fewest significant figures.

sig figs addition and subtraction

The answer carries the same number of decimal places as the number with the fewest decimal places.