# l3p - ISP209s10 Lecture 3-1- Today • Announcements: –...

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Unformatted text preview: ISP209s10 Lecture 3-1- Today • Announcements: – HW#2 and extra credit #1 is due Wednesday 1/27 by 8:00 am – Pls. register your clickers on LONCAPA • Loose ends from last class • Law of Inertia (Newton’s 1st Law) • What is Force? Introduction ISP209s10 Lecture 3-2- A pictorial way to calculate rates of change • Draw a line tangent to the curve at the time you want. The line can be any length. • Mark two points on the line and record the values. • Calculate the slope of the tangent line s m t t d d speed m 59 . 5 . 2 3 . 9 2 6 1 2 1 2 = ! ! = ! ! = = ISP209s10 Lecture 3-3- Speed versus distance plot Example: Motion of a car as a function of time. We can get this graph from this one by repeating the previous calculation for several different times and plotting the points ISP209s10 Lecture 3-4- Homework Problem Traveling Car 1st sketch the speed vs. time graph Next, use the speed graph to sketch the acceleration vs. time graph ISP209s10 Lecture 3-5- Adding and Subtracting 2 Vectors • Imagine two vectors ( A and B )represent two walks, one in one direction and the other in another direction. • A negative sign means "go the opposite direction the arrow shows". • The resultant vector ( C) points from your original starting point to where you ended up at the end of the second walk. ISP209s10 Lecture 3-6- Adding and Subtracting 2 Vectors Example 1: ISP209s10 Lecture 3-7- Adding and Subtracting 2 Vectors Example 2: ISP209s10 Lecture 3-8- History of our effort to understand motion • Aristotle(384 BC – 322 BC) – Natural motions: items seek their natural locations – Violent motions like moving across the room require an agent • Galileo (1564-1642) – Tried to deduce the laws of motion from experiments – Introduced the concept of inertia. (Inertia is not a well defined concept.) • Isaac Newton (1643-1727) – Formulated laws that govern planetary motion and most ** motion we see in our daily lives – Invented Calculus along the way – Many view Newton (along w/Einstein) as the “greatest” ever ** Except for the very small (Quantum Mechanics) and fast (Special Relativity) ISP209s10 Lecture 3-9- • Aristotle distinguished three kinds of motion • Natural motion : falling objects and liquids, rising air...
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## This note was uploaded on 05/04/2010 for the course ISP 209 taught by Professor Sherrill during the Spring '07 term at Michigan State University.

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l3p - ISP209s10 Lecture 3-1- Today • Announcements: –...

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