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The velocity Vector of this Point in the ReferenceFrame.

Parameters
==========

frame : ReferenceFrame
    The frame in which the returned velocity vector will be defined in

Examples
========(more...)

src/s/y/sympy-HEAD/sympy/physics/mechanics/tests/test_point.py   sympy(Download)
    assert P.vel(B) == qd * B.x + q2d * B.y
    O.set_vel(N, 0)
    assert O.vel(N) == 0
    assert P.a1pt_theory(O, N, B) == ((-25 * q + qdd) * B.x + (q2dd) * B.y +
                               (-10 * qd) * B.z)
    P = O.locatenew('P', 10 * B.x)
    O.set_vel(N, 5 * N.x)
    assert O.vel(N) == 5 * N.x
    assert P.a2pt_theory(O, N, B) == (-10 * qd**2) * B.x + (10 * qdd) * B.y
 

src/s/y/sympy-HEAD/sympy/physics/mechanics/tests/test_functions.py   sympy(Download)
    Dmc.v2pt_theory(C, N, R)
 
    vel_list = [Dmc.vel(N), C.vel(N), R.ang_vel_in(N)]
    u_list = [u1, u2, u3, u4, u5]
    assert (partial_velocity(vel_list, u_list, N) ==