A package is dropped from a plane which is flying with a constant horizontal velocity of V_a=50 m/s.

A package is dropped from a plane which is flying with a constant horizontal velocity of V_a=50 m/s. Determine the normal and tangential components of acceleration and the radius of curvature of the path of motion. a)at the moment the package is released at A, where it has a horizontal velocity of V_a= 50m/s, and b) just before it strikes the ground at B.- I'm totally lost in this exercise.. Help!