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# OAT Physics

### Chapter 1 -Units and Kinematics

TermDefinition
length m
mass kg
Force N
E/Work Joule
Time sec
Power Watt
Angstrom 10E-10m
nm 10^-9m
1 eV (electron-volt) 1.6E-19J
Kilo 10^3
Mega 10^6
Giga 10^9
micro -6
pico -12
nano -9
when multiplying multiply mantissa, add exponents
when dividing divide mantissa, subtract exponents
Sin 0 0
Cos 0 1
Sin 30 i/2
Cos 30 radical 3 over 2
Sin 45 radical 2 over 2
Cos 45 radical 2 over 2
Sin 90 1
Cos 90 0
Sin 180 0
Cos 180 -1
Sin 60 radical 3 over 2
Cos 60 1/2
Scalars magnitude but NO direction; speed, mass, E, distance
Vector magnitude AND direction; force, velocity, displacement, acceleration, momentum
resultant vector sum
Tan theta = 1 theta = 45 degrees
Kinematics branch of mechanics dealing with the description of motion
instantaneous speed magnitude of instantaneous velocity; scalar
instantaneous velocity refers to a single instant of time (specific time) ; vector
Avg speed distance/time
Avg velocity displacement/time
Avg Acceleration rate of change of an object's velocity so (delta velocity/delta time)
instantaneous acceleration acceleration at one point of a particle's path
acceleration due to gravity object in free-fall; 9.8m/s^2
projectile motion Vx is constant; a in x direction = 0
Motion EQ 1. v = v0 + at 2. x-x0 = v0t + (1/2)at^2 3. v^2 = v0^2 + 2a(x-x0)
At max height v = 0
Created by: vahajuddin