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OAT Physics
Chapter 1 -Units and Kinematics
Term | Definition |
---|---|
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 |