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A PHYS1410 xe a casual Garb Men's Sno x / N Netflix TV sho x O History tudent/Assignment-Responses/submit?dep 18940714 Question Difficulty In which of the following situations is the object's velocity changing? Choose all that apply. O A bus drives at a constant 30-mph as it goes down a hill with a constant incline. B A train rounds a curve without cha g speed. G A persen is running straight north at a constant speed. ? A car drives at a constant 20 mph as it goes over the top of a hill. a None of the objects is accelerating. A helicopter is ascending straight upward without speeding up or slowing down. O A car slows down while driving south along a level road. D A truck skids to a stop, traveling in a straight line. 3. 7.68/8 points 1 Previous Answers Ouestion Difficulty ? ?

Explanation / Answer

Followings are the situations when the velocity is changing

(i) A train rounds a curve without changing speed. Here, the magnitude is constant but the direction of velocity is changing.

(ii) A car slows down while driving south along a level road. Here the direction is not changing but the magnitude of velocity is changing.

(iii) A truck skids to a stop, traveling in a straight line. Here the direction is not changing but the magnitude of velocity is changing.

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