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

    Sep 12, 2011, 03:03 PM
    A rock is thrown vertically upward from the ground with an initial speed 15m/s.
    A rock is thrown vertically upward from the ground with an initial speed 15m/s.

    A. How high does go
    B. How much time is required for the rock to reach its maximum height?
    C. What is the rock's height at t=2.00s?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Sep 13, 2011, 05:55 AM
    It's all a matter of applying the various equations of motion:

    A. Use

    You've been given the rock's initial velocity, and you know the rock's velocity at its highest point is 0. Set a = g = -9.8m/s, and solve for d.

    B. Use and solve for t.

    C. Use .

    Post back with your answers and we'll check it for you.
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