Q. On a spacecraft two engines fire for a time of 585s. One gives the craft an acceleration in the x direction of ax = 5.1m/s2, whilst the other produces an acceleration in the y direction of ay = 7.3m/s2. At the end of the firing period, craft has velocity components of vx = 3810 m/s and vy = 4406 m/s. Find out the magnitude and direction of the initial velocity. State the direction as an angle with respect to the +x axis.