本题目来源于试卷: Space Time & Motion A.1 Kinematics，类别为 IB物理学
[单选题]
An object moves at constant velpyt /k:rcx9,jocity for a period of time, after which it undergctk9j/r:p xy,nk)35iba zgn ,oes uniform deceleration until it comes to rest. A velocity-time graph is plotted for this motion. On the graph, which of the following represents the displacement ofagnzn3i), k 5b the object?
A. Gradient of the line connecting the initial and final velocities.
B. x-intercept
C. y-intercept
D. Area under the graph
参考答案: D
本题详细解析:
For option A, the gradi0vrvhv yl 39y wj+(/oment of the line connecting the starting and ending velocities gives the average acceleration.
For opor v/l jv+(y9vw3h0ymtion B, x-intercept represents the time of when velocity is zero, therefore is incorrect.
For option C, y-intercept represents the velocity when the time is zero, therefore is incorrect.
For option D, area under the graph is the displacement, which is the correct answer.
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