Normal and tangential coordinates with cartesian frame

A package is dropped from the plane which is flying with a constant horizontal velocity of V_A=150 ft/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 and (b) just before it strikes the ground at B. Problem 12-141 Hibbeler Dynamics 14th edition
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