The coordinates of an object moving in the xy plane vary with time according to the following equations. t is in seconds and ω has units of seconds -1.
x = -(6.40 m) sin ωt

y = (4.00 m) - (6.40 m) cos ωt
(a) Determine the components of velocity and components of acceleration at t = 0.
vvec = ____ x + _____ y m/s
avec =____ x + _____ y m/s^2

(b) Write expressions for the position vector, the velocity vector, and the acceleration vector at any time t 0.
rvec = ______ x + _____ y m
vvec = ______ x + _____ y m/s
avec = ______ x + _____ y m/s^2

Question

The coordinates of an object moving in the xy plane vary with time according to the following equations. t is in seconds and ω has units of seconds -1. 
x = -(6.40 m) sin ωt 

y = (4.00 m) - (6.40 m) cos ωt 
(a) Determine the components of velocity and components of acceleration at t = 0.
vvec = ____ x + _____ y m/s 
avec =____ x + _____ y m/s^2 

(b) Write expressions for the position vector, the velocity vector, and the acceleration vector at any time t > 0.
rvec = ______ x + _____ y m 
vvec = ______ x + _____ y m/s 
avec = ______ x + _____ y m/s^2