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25 March, 01:15

A particle that has a mass of 2.5 kg is moving in the positive X-direction with a constant velocity of 1.6m/s. Suddenly a constant vertical force with a magnitude of 8N is applied in the positive Y-direction. what is the resulting vertical displacement over the time taken for a 10m horizontal displacement?

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  1. 25 March, 03:26
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    The particle has a constant horizontal velocity, and a vertical force won't affect the horizontal speed, so it should be fairly easy to find the last part, "the time taken for a 10m horizontal displacement," using a kinematic equation.

    X = x + vt + (1/2) at²

    10 = 0 + (1.6) t + (1/2) (0) t²

    10/1.6 = t

    t = 6.25s

    So now we have to find the vertical displacement over 6.25 seconds on a particle of a 2.5kg mass with a force of 8N.

    Start with Newton's second law.

    F = ma

    8 = (2.5) a

    a = 3.2m/s²

    Now, use kinematics again.

    Y = y + vt + (1/2) at²

    Y = 0 + (0) (6.25) + (1/2) (3.2) (6.25) ²

    Y = 62.5m
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