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Physics 1 Cheat Sheet (DRAFT) by

phys 1

This is a draft cheat sheet. It is a work in progress and is not finished yet.

SI units

Mass
kg
Distance
m
Time
s
Force
N

Prefixes

Kilo
10^3
Hecto
10^2
Deka
10^1
Deci
10^-1
Centi
10^-2
Milli
10^-3
Nano
10^-9

Vector Operations

Dot Product
a dot b = sum of vector components multiplied
Cross Products
Determ­inant of (i j k, x y z, x y z)

Notes

Notes

 

1d motion

v_avg = delta x/ delta t
v = dx/dt
displa­cement is scalar, distance is vector

5 function

d = v * t
v = a * t + v_0
x = 1/2 a * t2 + v_0 * t + x_0
v2 - v_02 = 2 * a * d
x = (v+v_0 )t/2

Vector Notations

Rotational Accele­ration

a_c = v2/r
T = period
v = 2pir/T

Notes

Newtons Laws

1. If sum forces = 0, no accele­ration. At rest stays at rest, motion stays at same speed
2. net force = mass * accele­ration
3. if object A pushes on B, (F_ab) then object b exerts equal force on object A (F_ba)

Force

Force is a vector
Net force = sum of all forces
Normal force is from surface on object, perpen­dicular
friction is from surface on object, parallel to surface
Tension from pulling force
Weight pull of gravity (mg)