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Math Help - Velocity problem!

  1. #1
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    Velocity problem!

    Today was the first day of school and i'm in calculus right now and i do not know how to do this problem....

    If a ball is thrown into the air with a velocity of 40 ft/s, its height in feet t seconds later is given by y=40t-16t^2.
    (a) Find the average velocity for the time period beginning with t=2 and lasting:

    (i) 0.5 second
    (ii) 0.1 second
    (iii) 0.05 second
    (iv) 0.01 second

    (b) Estimate the instantaneous velocity when t=2.

    Please help!
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  2. #2
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    i doubt someone will be up at 12 am to help me. well it depends on what time zone people are in. but I'm in pacific time and its 12:10 am and I've tried this problem numerous times .
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  3. #3
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by yoman360 View Post
    Today was the first day of school and i'm in calculus right now and i do not know how to do this problem....

    If a ball is thrown into the air with a velocity of 40 ft/s, its height in feet t seconds later is given by y=40t-16t^2.
    (a) Find the average velocity for the time period beginning with t=2 and lasting:

    (i) 0.5 second
    (ii) 0.1 second
    (iii) 0.05 second
    (iv) 0.01 second

    (b) Estimate the instantaneous velocity when t=2.

    Please help!
    The intervals in question:

    [2,2.5],[2,2.1],[2,2.05],[2,2.01]

    So do what I told you to do in the other thread you posted.

    However, for b), just make an educated guess as to what the velocity at t=2 would be.
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  4. #4
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by yoman360 View Post
    i doubt someone will be up at 12 am to help me. well it depends on what time zone people are in. but I'm in pacific time and its 12:10 am and I've tried this problem numerous times .
    It's 3:13am here.
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