Question 285512
If the horizontal distance is 30m and the string is 50m, the vertical distance is 40m (3,4,5 triangle).
Kite is moving away at 5000/3600 horizontally (in m/s)
Ratio of string extension to horizontal distance is 5 to 3
So 5000/3600 = 1.39 m/s
String released at (5/3)x 1.39 = 2.32 m/s (Roughly 2 1/3 m/s)