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Advanced Placement (AP)Advanced Placement (AP)
26 April, 19:32

Two identical spheres are released from a device at time t = 0 from the same height H, as shown above. Sphere A has no initial velocity and falls straight down. Sphere B is given an initial horizontal velocity of magnitude v0 and travels a horizontal distance D before it reaches the ground. The spheres reach the ground at the same time t f, even though sphere B has more distance to cover before landing. Air resistance is negligible.

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  1. 26 April, 20:46
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    The spheres reach the ground at the same time (true)

    Explanation:

    The acceleration in the vertical direction is the same for both spheres, so the distance they cover in a given time is the same. The additional (horizontal) distance covered by sphere B is facilitated by its horizontal velocity.

    True: the spheres reach the ground at the same time.
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