A. A car is speeding up to the left. Assume that the tires are not slipping. In

Question

A.

A car is speeding up to the left. Assume that the tires are not slipping. In which direction are the tires' angular velocity pointing?

B.

A car is slowing down to the left. Assume that the tires are not slipping. In which direction are the tires' angular velocity pointing?

C. A car is speeding up to the left. Assume that the tires are not slipping. In which direction are the tires' angular acceleration pointing

D. A car is slowing down to the left. Assume that the tires are not slipping. In which direction are the tires' angular acceleration pointing?

A car is slowing down to the left. Assume that the tires are not slipping. In which direction are the tires' angular velocity pointing?

Explanation / Answer

Angular Velocity is perpendicular to the plane of raotation and the direction depends on the drection of rotation(clockwise or anti-clockwise) of the object and doesnot depend on the rate of change(i.e accelerating or deccelerating and

The direction of angular acceleration is perpendicular to the plane of rotation and depends also on the direction of change of rotational speed.

A) If the car is speeding up to the left on the paper, implies the rotation is anti-clockwise so the direction of angular velocity is out of the plane of paper.

B) If the car is slowing down to left it is still going left and the rotation is still anti-clockwise, so the angular velocity is out of the paper.

C) If the car is speeding to left the increase in rotational speed is anti-clockwise so the angular acceleration is out of the plane of paper.

D) If the car is slowing towards left the increase of rotational speed is clockwise so the angular acceleration is into the plane of paper.

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