Question

A hawk leaves her nest, circles it at a fixed distance, then returns to the nest.
While circling her displacement from home is (increasing / decreasing / staying the same)
Over the whole day her displacement from home is (positive / negative / zero)

Answer 1

While circling at a fixed distance: staying the same.
Over the whole day: zero.

Explanation: "Displacement from home" as distance from the nest stays constant while she circles. Her displacement vector does change direction, however. Because she ends at the nest where she started, the net (total) displacement for the day is zero.