Formulary Physics

Vectors

Fx = F ⋅ Cosθ

Fy = F ⋅ Sinθ

θ = Tan−1 Fy

Fx

FR =

(∑Fx)2  + (∑Fy)2

ONE DIMENSIONAL MOTION

U.L.M.

A.U.L.M

Constant Velocity

No acceleration a=0

over “x” axis

a = ΔV

Δt

Free Fall

Upward Vertical Throw

g ↓ (−)

y(−)

V ↓ (−)

g ↓ (−)

y(+)

V ↑ (+)

V ↓ (−)

(“x” = “y”)        a = ag = g        g = 9.8 m/s2 g = 980 cm/s2 G = 32 ft/s2

a = V − Vo

t

V f   = Vo  + gt

V  = Δx

Δt

V f = Vo + at

gt 2

y =  yo  + Vo t + 2

V  = x

t

2

x = x   + V t + at

o        o        2

V 2  = V 2  + 2gΔy

f        o

Δx = x f − xo

V 2 = V 2 + 2aΔx

f        o

(V    + V )

y = y  +        o        f    t

o        2

Δt = t f − to

(V   + V )

x = x  +        o        f    t

0        2

Remember that when the velocity is decreasing, then the acceleration is negative. If is increasing then the acceleration is positive

If starts from the rest the initial velocity is zero and if it brakes until stop at the end

then the final velocity is zero.