2007-11-01 Lab 08 - One Dimensional Collisions

# 2007-11-01 Lab 08 - One Dimensional Collisions - / Partners...

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/ Physics 295 Introductory Laboratory I Partners Section Date LAB 8: ONE-DIMENSIONAL COLLISIONS ......... In any system of bodies which act on eachother, action and reaction, estimated by momentum gained and lost, balance each other according to the laws of equilibrium. Jean de la Rond D'Alembert 18th Century OBJECTIVES · To understand the definition of momentum and its vector nature as it applies to one- dimensional collisions · To develop the concept of impulse to explain how forces act over time when an object undergoes a colIision. · To study the interaction forces between objects that undergo colIisions. · To examine the relationship between impulse and momentum experimentally III elastic and inelastic colIisions. Physics Material: Defmition of momentum, Definition of Impulse, Impulse-momentum Theorem, Conservation of Momentum. OVERVIEW In this lab we. will explore the forces of interaction between two objects and study the changes in motion that result from these interactions. We are especially interested in studying colIisions and explosions in which interactions take place in fractions of a second or pi --;Jt,.- F less. Early investigators spent a considerable amount of time trying to observe collisions and explosions, but they encountered difficulties. This is not surprising, since the observation of the details of such phenomena requires the use of instrumentation--such as high speed cameras--that was not yet invented. However, the principles describing the outcomes of collisions were well understood by the late seventeenth centl!ry when several leading European scientists including Isaac @1993-94 P. Laws, D. Sokoloff and R. Thornton Supported by National Science Foundation and the U.S. Dept. of Education (FlPSE) Note: These materials have been modified locally for use in the U of L laboratories. Page 8-1

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Page 8-2 Real Time Physics: Active Learning Laboratory V1.40--8/94 I Newton developed the concept of quantity-oj-motion to describe both elastic collisions in which objects bounce off each other and inelastic collisions in which objects stick together. These days we use the word momentum rather than quantity-oj-motion in describing collisions and explosions. We will begin our study of collisions by exploring the relationship between the forces experienced by an object and its momentum change. It can be shown mathematically from Newton's laws and experimentally from our own observations, that the change in momentum of an object is equal to a quantity called impulse. Impulse is a quantity which takes into account both the magnitude of the applied force at each instant in time, and the time interval over which this force acts. The statement of equality between impulse and momentum change is known as the impulse~momentum theorem. INVESTIGATION
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## This note was uploaded on 09/08/2008 for the course PHYS 295 taught by Professor Brown during the Fall '07 term at University of Louisville.

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2007-11-01 Lab 08 - One Dimensional Collisions - / Partners...

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