emilyscroggins36931 emilyscroggins36931

11-01-2024
Physics

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Which student statement correctly describes the motion of the object?
A The object is slowing down from 5 s to 7 s. The slope of a velocity-time graph is acceleration and for this time interval, the line segment shows a negative slope. Objects speed up when they have a positive acceleration and slow down when they have negative acceleration
B The object is slowing down from 5 s to 7 s. The slope of a velocity-time graph is acceleration. However, for an object to slow down the velocity and acceleration have opposite signs (one is positive and the other is negative). The signs for velocity and acceleration are the opposite for the whole time interval.
C The object is slowing down from 15 s to 20 s. The slope of a velocity-time graph is acceleration, and for this time interval, the linesegment shows a positive slope. Objects speed up when they have a positive acceleration and slow down when theyhave negative acceleration
D The object is slowing down from 15 s to 20 s. The slope of a velocity-time graph is acceleration. However, for an object to slowdown the velocity and acceleration must have opposite signs (one being positive and the other being negative). The signs for
velocity and acceleration are the opposite during this time interval.

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