When the Sun is directly overhead, a hawk

Question

dives toward the ground at a speed of
6.09 m/s.
If the direction of his motion is at an angle
of 78.6
â—¦ below the horizontal, calculate the
speed of his shadow along the ground.
Answer in units of m/s

Answer 1

I am going to assume a flat and earth and the sun at infinity :)

In that case the tip of the hawk's shadow is directly under the hawk and moves at the hawk's horizontal speed.

u = 6.09 cos 78.6