# Physics Questions Assignment | Homework Help Websites

Physics 2201

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Homework 2 Due 01/29/19. 10 points each

1. The three graphs below (two are velocity-time, one is position-time) describe one dimensional motions.

1. Use one or more of the following terms to describe the motion depicted on each graph:

“constant velocity”, “constant acceleration”, and/or “variable acceleration”. In each case briefly explain why the term applies.

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1. Assume graph A represents the motion of an object tracked by a motion detector.
2. Sketch graph A on your solution sheet and label the graph to show where the object is slowing down, speeding up, moving towards the detector, moving away from the detector, respectively.

1. Consider the velocity-time graph below which describes the horizontal motion of an object and is referenced to the coordinate system also shown.

1. At t=0 is the object moving left to right or right to left? How can you tell?
2. Is the object accelerating? If so in which direction, left to right or right to left, is the acceleration directed? Explain your reasoning.
3. Does the object continuously speed up, slow down, or do a little of both during the time intervald is played on the graph. Explain your answer and be specific.
4. Assume that at t=0 the object is crossing the origin (x=0). Sketch a position-time graph (x-t)consistent with the velocity-time graph.

 3.      The figure at the right represents the position vs. clock reading of the motion of two balls, A and B, moving on parallel tracks. Carefully sketch the figure on your homework paper and answer the following questions:

1. Mark with the symbol ta along the t-axis any instant or instants at which one ball is passing the other. Explain your reasoning.
2. Which ball is moving faster at clock reading tb?
3. Mark with the symbol tc along the t-axis any instant or instants at which the balls have the same velocity. Explain your reasoning.
4. Over the period of time show in the diagram, which of the following is true for ball B?
1. It is speeding up all the time.
2. It is slowing down all the time.
3. It is speeding up part of the way and slowing down part of the way.

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