physics

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An antelope moving with constant acceleration covers the distance between two points 70.0
m apart in 7.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first
point? (b) What is its acceleration?

  • physics -

    d = Vi t + .5 a t^2
    70 = 7 Vi + 24.5 a

    v = Vi + a t
    15 = Vi + 7 a
    so Vi = (15 - 7 a)

    70 = 7(15-7a) + 24.5 a
    solve for a
    go back and solve for Vi

  • physics -

    ERER

  • physics -

    5 m/s

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