Wednesday, August 29, 2001
Announcements:
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WebAssign homework
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WebAssign registration - pay online with credit card or buy access card
in bookstore
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View key to see answers to Essay questions.
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Conserve paper by answering questions directly from the book
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Review solution to Ch.1, MC7 (volume of spheres)
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Number of atoms in 1 cubic cm = 10e23 = 1 x 10^24
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Answers to MC questions and odd-numbered Conceptual questions and Problems
are in the back of your textbook
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I will be out of town next week, but should have access to email
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Another professor will teach class in my absence.
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Vote on Exam dates (see Daily Schedule for
revised dates)
Chapter 2: Motion in One Dimension
Displacement (a vector) is the change in position of an object
Distance is the total length traversed by an object.
Average velocity = displacement/time interval
(Instantaneous) velocity: v = dx/dt
Speed (a scalar) is the magnitude of the velocity (a vector)
Average acceleration = change in velocity/change in time
(Instantaneous) acceleration: a = dv/dt
The magnitude of the acceleration does not have a special name.
What is the displacement of the seating chart as it moves from one side
of the room to the other?
Example: Walk forward 3 m and back 3 m in 3 sec. What are
the above quantities?
Assignments:
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WebAssign HW2a due Friday
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Register for WebAssign
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Begin Canoe problem (not due until next Wednesday)