A car is moving along a horizontal road at a constant velocity that is directed 45° south of east. What is the direction of the angular velocity of the wheels of the car?
A)45° south of west
B)45° north of west
C)45° south of east
D)45° north of east
E)due east

Question

Quizplus · Accepted Answer

The direction of the angular velocity of the wheels of the car is perpendicular to the direction of motion and in the direction of the rotation. Since the car is moving 45° south of east, the direction of its velocity is also 45° north of east. Therefore, the direction of the angular velocity of the wheels must be 45° perpendicular to this, which is 45° north of east. Choice D is the only option that matches this direction.

A Car Is Moving Along a Horizontal Road at a Constant