67. Movement of a point on the curve defined by the equations x = and y = A1t3 A2t, where A1 = 1 m / s3, A2 = 2 m / s. Find the equation of the trajectory of her speed and complete υ acceleration a at time t = 0,8 s.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)