[单选题]
An object moves at constant velocity for a period of time, after which it 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 displacement 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:
Explaination:For option A, the gradient of the line connecting the starting and ending velocities gives the average 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.
