Acar is driving around a circular track at constant speed. at one instant, the car is driving northward and sometime later the car is driving westward. what is the direction of the car’s average change in velocity during this time interval?

Southwest

Explanation:

when the car is moving around a circular track at constant speed, velocity changes due to change in the direction. The direction at any instant is given by tangent drawn at the point on the circular path.

At instant 1: direction is northwards

At instant 2: direction is westwards

Let the constant speed be v. Then, at instant 1, the velocity would be:

At instant 2, the velocity would be:

Change in velocity =

The direction of car's average change would be southwest.

i think the answer would be b

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