Algebra

A football is kicked off the ground at an initial upward velocity of 20 m/sec.
(We are using d=rt-5t^2)

a. Calculate the altitude after 2.7 sec
b. When will the ball be at 17 m above the ground?
c. When is the ball at the highest point?
d. How high is the ball at its highest point?

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asked by Austin
  1. altitude= Vi*time- 4.9 time^2
    use that for a, b.

    For c, note that velocity at the top is zero.

    Vtop=Vi*time-4.9t^2
    solve for time

    d. use the first equation again.

  2. a.10

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    posted by Alfred

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