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Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at launch? Neglect air resistance.


A) 11 m/s
B) 23 m/s
C) 34 m/s
D) 45 m/s
E) 48 m/s

Correct Answer

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An object is moving with constant non-zero velocity in the +x direction.The velocity versus time graph of this object is


A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the time axis.
D) a parabolic curve.

Correct Answer

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