See the post link below which gives the ability to find the gradient of a vector, not a scalar field.
http://www.mapleprimes.com/forum/gradientvectornotgradientscalarfunction
The solution was to use the Jacobian command. Now I need to take the time derivative of that expression because now the velocity is a function in time. Unfortunately, MAPLE wants an algebraic expression for d/dt operations. What command to I need to use for this operation??
