Lucas programs his quadcopter to fly with a velocity (speed and direction) vector p
⃗
=
4
i
^
+
7
j
^
p
​
=4
i
^
+7
j
^
​
p, with, vector, on top, equals, 4, i, with, hat, on top, plus, 7, j, with, hat, on top, which should send it straight at its target (in the absence of wind). To his dismay, his quadcopter actually moves with a velocity vector
a
⃗
=
2
i
^
+
8
j
^
a
=2
i
^
+8
j
^
​
a, with, vector, on top, equals, 2, i, with, hat, on top, plus, 8, j, with, hat, on top.