Magnitude of Initial velocity of Spacecraft
On a spacecraft two engines fire for a time of 572 s. One gives the craft an acceleration in the x direction of ax = 5.15 m/s2, while the other produces an acceleration in the y direction of ay = 7.41 m/s2. At the end of the firing period, the craft has velocity components of vx = 3782 m/s and vy = 4842 m/s. Calculate the magnitude of the initial velocity.
Attempt
add the square root of 3782 and the square root of 4842
take the square root of the sum 131.082
=11.42 m/s(incorrect)
