A student walks east 100 meters in 2 minutes. She then walks north 200 meters in 4 minutes. Which statement is true?(1 point)

Question

Responses:

Her velocity changes because her speed varies.
Her velocity changes because her speed varies.

Her velocity is constant because her speed is constant.
Her velocity is constant because her speed is constant.

Her velocity is constant because her direction is constant.
Her velocity is constant because her direction is constant.

Her velocity changes because her direction changes.

Answer 1

The correct statement is:

Her velocity changes because her direction changes.

This is true because velocity is a vector quantity that depends on both speed and direction. In this case, the student first walks east and then north, indicating a change in direction. Even if the speed might be constant or vary, the change in direction means the velocity is not constant.