Q1. On a spacecraft two engines fire for a time of 600s. One gives the craft an acceleration in the x direction of ax = 5.10m/s2, while the other produces an acceleration in y direction of ay = 7.3m/s2. At the end of the firing period, the craft has velocity components of vx = 3565 m/s and vy = 4556 m/s. Find the magnitude and direction of the initial velocity. State the direction as an angle with respect to the +x axis.

Q2. A marble is thrown horizontally with a speed of 19.0 m/s from the top of building. When it strikes the ground, marble has a velocity that makes an angle 75° with the horizontal. From what height above the ground was the marble thrown?