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    alioo's Avatar
    alioo Posts: 1, Reputation: 1
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    #1

    Jan 1, 2012, 12:16 PM
    physics questions grade 11?
    air resistance is neglected...
    the horizontal velocity component of an arrow fired from a bow _______ with distance travelled

    a. decreases linearely frm zero
    b. stays constant at a non-zero value

    the answer is B bt I want the reason please
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    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jan 3, 2012, 06:43 AM
    Neglecting air resistance, there is no force that acts on the arrow in the horiziontal direction. From F=ma, if F = 0 in the horizontal direction then there is no acceleration (or deceleration) of the arrow in the horizontal direction. Hence it moves at constant velocity in the horizontal direction.

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