Question

Which of the following descriptions could apply to an accelerating car?

I. A car rounding a curve

II. A car speeding up to get on a freeway

III. A car slowing down to get off a freeway

IV. A car maintaining a constant speed

(A ) II

(B ) II and III

(C ) I, II, and III

(D) All choices could represent an accelerating car.

Answer 1

The acceleraion could mean either change of the magnitude of the velocity (cases II and III), or its direction (case I). If the car maintaining a constant speed, then the acceleration is 0. Thus, the answer is C.

Answer. (C ) I, II, and III.