In Problem 14.87, what is the instantaneous radius of curvature of the plane’s path at t =...

In Problem 14.87, what is the instantaneous radius of curvature of the plane’s path at t = 2 s? The vector components of the sum of the forces in the directions tangential and normal to the path lie in the osculating plane. Determine the components of a unit vector perpendicular to the osculating plane at t = 2 s.