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    baseballer1234's Avatar
    baseballer1234 Posts: 1, Reputation: 1
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    #1

    Apr 11, 2009, 02:38 AM
    Finding average acceleration and point acceleration
    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 260 m, and the car completes the turn in 40.0 s.

    I need to find the acceleration at a point 35 degrees below the horizontal in terms of vectors I and j

    Can anyone point me in the right direction?!
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    Apr 13, 2009, 11:59 AM

    The acceleration vector for an object moving along a circular arc at a uniform speed is directly towards the center of circle. Your problem makes reference to a figure, which you did not include, so I can't tell what you mean by "35 degrees below the horizontal." But if you draw a line fom that point to the center of radius for the turn you'll have your direction of acceleration. It's magnitude is v^2/r. You then need to resolve that vector into horizontal and vertical components to get the answer in terms of vectors I and j.
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