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Math Help - Velocity

  1. #1
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    Velocity

    Let v(t)=t^2-2t be the velocity, in ft/sec, of an objectat time t, in seconds.

    (A) What is the initial velocity v(0)? Im pretty sure this answer is zero.

    (B)When does the object have a velocity of Zero?

    (C) What is the meaning of the quantity v(3)? What are its units? I think the answer is 3ft/sec
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  2. #2
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    Quote Originally Posted by asweet1 View Post
    Let v(t)=t^2-2t be the velocity, in ft/sec, of an objectat time t, in seconds.

    (A) What is the initial velocity v(0)? Im pretty sure this answer is zero.

    Mr F says: Correct.

    (B)When does the object have a velocity of Zero?

    Mr F says: Solve 0 = t^2-2t => 0 = t(t - 2).

    (C) What is the meaning of the quantity v(3)? What are its units? I think the answer is 3ft/sec

    Mr F says: Your units are correct. The meaning is that it gives the rate of change of the objects displacement with respect to time at t = 3.
    ..
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