a child saw a skunk in a hole of a tree, standing 2.5m away. the child attempted to throw a pebble into the hole but missed with a speed of 11m/s. Angle of elevation is 75 degree, what was the Vfy of the pebble.
Viy = 11 sin75°
h = Viy t - 4.9t^2
solve for t in h=0, then
Vy = Viy - 9.8t
Use the t from above to get Vfy