posted by blasting .
One end of a cord is fixed and a small 0.610 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m as shown in the figure below. When θ = 18.0°, the speed of the object is 4.50 m/s. At this instant, find each of the following.
if they ask find the total acceleration inward and below the cord at? When i find the angle for this, do i take arctan(centripetal accel/tangantial accel) or arctan(tang accel/cent accel)