to a toy car which can move to the right or left along a horizontal line (the po
ID: 1875602 • Letter: T
Question
to a toy car which can move to the right or left along a horizontal line (the positive portion of the distance axis). Choose the correet velocity-time graph (A - G) for each of the following questions. You may use a graph more than once or not at all. If you think that none is correct, answer choice J Which velocity graph shows the car moving toward the left (toward the origin) at a constant velocity? 24. 22. Which velocity graph shows the car moving toward the right (away from the origin) at a steady (constant) velocity? Which velocity graph shows the car increasing its speed at a steady (constant) rate? 25. 23. Which velocity graph shows the car reversing direction? Questions 26 28 refer to a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again. Use choice A, B, or C to indicate the sign of the acceleration of the coin for each of the cases described below. Take up to be the positiveC. direction. Answer choice J if you think that none is The acceleration is negative. The acceleration is zero. The acceleration is positive. A. B. 26. 27. 28· The coin is moving upward after it is released. The coin is at its highest point. The coin is moving downward.Explanation / Answer
22 (A) because in graph A ,value of y axis is not changing,it means velocity has fixed value(constant value).and graph is above x axis it means velocity is away from origin..
23 (f).when car reverse it direction it means ,some of it portion should be above x axis and some should be below x azix,only graph f satisfy this condition.
24*(B)
25 *(D),in this grph value of y axis is increasing.which means velocity increases.and graph is straight line ,which means velocity increases with constant rate.
26 (A)
27(A)
28 *(A) when ever body move vertically under the influence of gravity its acceleration alway DOWNWARD.
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