Ch1: Kinematics and Dynamics - Kaplan MCAT P+M

the metric system may be given in 2 ways:

1. MKS: meters, kilograms, seconds

2. CGS: centimeters, grams, seconds

SI unit for length

meter (m)

SI unit for mass (not weight)

kilogram (kg)

SI unit for time

second (s)

SI unit for current

ampere (coulomb/second): (A)

SI unit for amount of substance

mole (mol)

SI unit for temperature

kelvin (K)

SI unit for luminous intensity

candela (cd)

base units

standard units around which the measurement system itself is designed

derived units

created by associating base units with each other

SI unit of force

newton (N)

units: (kg*m)/(s²)

SI unit of work and energy

joule (J)

units: (kg*m²)(s²)

J=N*M

SI unit of power

watt(W)

units: (kg*m²)/(s²)

W=J/s

ångströms

1 Å = 10^-10 m

nanometers

1 nm = 10^-9 m

electron-volts

1 eV = 1.6×10^-19J

• represents amount of energy gained by an e- accelerating through a potential difference of 1 volt

vectors

numbers that have magnitude and direction

• includes: displacement, velocity, acceleration, and force

• may be represented by arrows: direction of arrow = direction of vector

• length of arrow is proportional to magnitude of vector quantity

scalars

numbers that have magnitude only and no direction

• includes: distance, speed, energy, pressure, mass

common notations for vector quantity

either arrow or boldface

(A or 𝐴⃗)

common notation for magnitude of displacement between two positions (vectors)

|𝐴⃗|, |A|, or A

common notation for scalar quantities

italics: the distance between two points could be represented by d