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 costb z 2s/rpmtz6ea +.lxa-5hz 6b (d)wnstant velocity for a period of time, after which i p08 tsgtxcr6:ggk2 p7t undergoes 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 dis:t0 kg6t7 pg2c8 psxgrplacement of 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 gradient of the line connecting the starting and ending (n m ;eg6tmz0 5rbgn)6a1nw ozvelocities gives the ave ;we g mn5r)t(nzmobna0g6 6z1rage acceleration.
For option 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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