PHYSICS FORMULAS

kph 5/18

formula for m/s (conversion)

m/s(18/5)

formula for kph (conversion)

magnitude and direction of resultant

component method (magnitude and direction of resultant)

d, v, t triangle

URM (horizontal)

Vf = Vo + at

first UAM formula

d = Vot + ½ at²

2nd UAM formula

Vf² = Vo² + 2ad

3rd UAM formula

d = (Vo + Vf)/2 x t

4th UAm

Vox = Vo cosθ (h)
Voy = Vo cosθ (v)

projectile motion horizontal and vertical axis

fma triangle

force

Fg = Gm1 m2/r²

universal law of gravitation

mass x gravity

weight (N)

ΣFx = 0, ΣFy = 0

law of inertia

a = Vf - Vo / t

law of acceleration

mew (normal force)

friction force = ??

1. force x displacement

2. f x d x cos θ

3. △ KE

work

1. positive work if same direction

2. negative work if displacement is opposite (there is friction)

3. w=0 if perpendicular

3 cases for work

½ mv²

kinetic energy formula

mass x gravity x height

potential energy

KE + PE

mechanical energy

work/time

power

mass x velocity

momentum (P)

• force x time

• △ momentum

impulse (J)

ΣPi = ΣPf

collision

• ΣKei = ΣKef

• ΣKei ≠ ΣKef

elastic and inelastic

m1v1i + m2v2i = (m1 + m2) x velocity x force

perfectly inelastic