Inez is driving in a straight line. Her velocity and acceleration are both positive values. If north is the positive direction, which of the following statements about her motion is accurate?

Question

She is moving south, and her speed is increasing.

She is moving south, and her speed is decreasing.

She is moving north, and her speed is increasing.

She is moving north, and her speed is decreasing.

Answer 1

If Inez's velocity and acceleration are both positive values and north is defined as the positive direction, she must be moving north.

Since both her velocity (which indicates her direction of motion) and acceleration (which indicates the change in her speed) are positive, this means that her speed is increasing while she is moving north.

Therefore, the accurate statement about her motion is:

She is moving north, and her speed is increasing.