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28 November, 20:58

A projectile is thrown at an angle 30° from horizontal. Which statement about its vertical component of velocity is true?

A. The magnitude of the vertical velocity decreases as the projectile moves upward.

B. The magnitude of the vertical velocity remains constant over time.

C. The magnitude of the vertical velocity decreases as the projectile moves downward.

D. The magnitude of the vertical velocity increases as the projectile moves upward.

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  1. 28 November, 21:24
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    Answer: A

    There is constant downward acceleration due to the gravitational force exerted on the object due to the earth's gravitational field

    By Newton's second law,

    Force=Acceleration * Mass

    Since vertical velocity is upward while vertical acceleration is downward, vertical velocity decreases as it moves upward.
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