v = dx/dt , a = dv/dt =d2x/dt2
v = v0 + a t
x = x0 + v0 t + 1/2 a t2
v2 = v02 + 2 a x
Fnet = m a
FR = (m v2)/R
F = G m1 m2/ r2
W = F (cos θ) d
Wnet = Δ KE
KE = 1/2 m v2
PEg = m g y
PEs = 1/2 k x2
g = 9.8 m/s2
G = 6.67 x 10-11 Nm2/kg2