Two quadcopter drones, Drone A and Drone B, collide in mid-air and become entangled, flying together as a single mass immediately after the collision.
Drone A has a mass of 1.5 kg and is flying due North at 12.0 m s-1. Drone B has a mass of 2.5 kg and is flying due East at 6.0 m s-1.
What is the magnitude of the velocity of the combined wreckage immediately after the collision?
4.5 m s−14.5\text{ m s}^{-1}4.5 m s−1
5.9 m s−15.9\text{ m s}^{-1}5.9 m s−1
6.7 m s−16.7\text{ m s}^{-1}6.7 m s−1
8.3 m s−18.3\text{ m s}^{-1}8.3 m s−1