Suppose an object starts at time t=0 at a position defined as x=0 m. At t =.5 s the object is at x=1.5 m. At t =1 s the object is at 2.0 m. What is the average velocity for the first interval (approximated at t=.25 s) and the second interval (approximated at t=.75 s)?   I'm mainly confused about what is meant by approximated at t=.25 and t=.75?

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
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Suppose an object starts at time t=0 at a position defined as x=0 m. At t =.5 s the object is at x=1.5 m. At t =1 s the object is at 2.0 m. What is the average velocity for the first interval (approximated at t=.25 s) and the second interval (approximated at t=.75 s)?

 

I'm mainly confused about what is meant by approximated at t=.25 and t=.75?

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