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25 June, 10:12

An object is shot vertically upward into the air with a positive initial velocity. What correctly describes the velocity and acceleration of the object at its maximum elevation?

Velocity Acceleration

(A) Positive Positive

(B) Zero Negative

(C) Positive Negative

(D) Zero Zero

(E) Negative Negative

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Answers (1)
  1. 25 June, 12:51
    0
    option (B)

    Explanation:

    According to the vector analysis, the upward direction is taken as positive and the downward direction is taken as negative.

    Similarly, the rightward direction is taken as positive while the leftward direction is taken as negative.

    As the object is hot vertically upwards so the direction of velocity is taken as positive as given in the question.

    At the maximum height, the velocity is zero.

    The acceleration acting on the object is acceleration due to gravity which is always acting downwards so it is taken as negative.

    Thus, option (B) is true.
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