A student walks east 100 meters in 2 minutes. She then walks north 200 meters in 4 minutes. Which statement is true?(1 point)
Responses
Her velocity changes because her direction changes.
Her velocity changes because her direction changes.
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 changes because her direction changes.
To determine which statement is true, we need to understand the concepts of velocity, speed, and constant motion.
Velocity is a vector quantity that includes both speed and direction. It represents the rate at which an object changes its position. Speed, on the other hand, is a scalar quantity that only refers to the magnitude or quantity of how fast an object is moving, without considering its direction.
In the given scenario, the student walks east for 100 meters in 2 minutes. This means she is changing her position in both magnitude and direction. Therefore, her velocity is changing. The statement "Her velocity changes because her direction changes" is correct.
Additionally, the student then walks north for 200 meters in 4 minutes. Again, she is changing her position in both magnitude and direction, leading to a change in velocity.
So, the correct answer is: "Her velocity changes because her direction changes"