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Unformatted text preview: / Physics 295 Introductory Laboratory I Partners Section Date LAB 5: FORCE, MASS AND ACCELERATION ", , . equalforces shall effectan equal changein equal bodies. . ." 1.Newton OBJECTIVES To develop a definition of mass in terms of an object's acceleration under the influence of a force. To understand the relationship among the force applied to an object, the mass of the object and its motion. To find a mathematical relationship between the acceleration of an object and its mass when a constant force is applied--Newton's Second Law. To examine the quantitative relationship between force, mass and acceleration-- Newton's Second Law--in terms of the SI units (N for force, kg for mass, and mIs/s for acceleration). To generalize from all of the observations and state Newton's First and Second Laws of Motion for motion in one dimension that is along a straight line for any number of forces acting on an object. Physics Material: Defmition of force, Newton's Laws of Motion. @1993-94P. Laws, D. Sokoloff, R. Thornton Supported by National Science Foundation and the U.S.Dept. of Education (FIPSE) Note: These materials have been modified locally. for use in the U of L laboratories Page5-1 Page5-2 Real Time Physics: Active Learning Laboratory V1.30--7/94 OVERVIEW In this lab you will continue to develop the first two of Newton's famous laws of motion. You will do this by combining careful definitions of force and mass with observations of the mathematical relationships among force, mass and acceleration. You have seen that the acceleration of an object is directly proportional to the combined or net force acting on the object. If the combined force is not zero, then the object will accelerate. If the combined force is constant, then the acceleration is also constant. These observations can be summarized by Newton's Second Law of Motion. You have also seen that for an object to move at a constant velocity (zero acceleration) when friction is negligible, the combined or net force on the object should be zero. The law which describes constant velocity motion of an object is Newton's First Law of Motion. Newton's First and Second Laws of Motion are very powerful! They allow you to relate the force on' an object to its subsequent motion. Therefore, when the nature of the force(s) acting on an object is known, then Newton's laws of motion allow you to make mathematical predictions of the object's motion. In Investigation 1 of this lab you will study how the amount of "stuff" (mass) you are accelerating with a force affects the magnitude of the acceleration. What if the same force acted on objects with larger or smaller mass? How would this affect the acceleration of the object for a given combined force?...
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