7.5.9
The law of motion of a point in a rectangular coordinate system is given: x = 2 t, y = 3 t, z = 5 t. Determine the curvilinear coordinate s of the point at time t = 10 s, if at t0 = 0 s0 = 14 m and the point moves in the positive direction of the coordinate s. (Response 75.6)