# Lec-05 - NEWTON'S FIRST AND SECOND LAWS OF MOTION Learning...

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1 [©2008 RJ Bieniek] N EWTON S F IRST AND S ECOND L AWS OF M OTION Learning Objectives After you complete the homework associated with this lecture, you should be able to: Clearly state, both verbally and mathematically, Newton’s first two laws of motion. Use Newton’s Second Law (the force law) to determine the unique acceleration of an object. Draw informative free-body diagrams to analyze the forces and acceleration in a physical situation. Work force problems algebraically and numerically for a single object. 2 [©2008 RJ Bieniek] N EWTON S L AWS OF M OTION C Explain how the macroscopic world we are most familiar with operates. C Newton’s Laws explain how planes fly and automobiles run. C Cannot explain the micro world of atoms, nuclei, electronics, and nanotechnology. C Offers powerful description of Nature’s operation. 3 [©2008 RJ Bieniek] N EWTON S F IRST L AW Translation: If no external force acts on an object, its velocity remains constant. 3 F P = 0 Y v P = constant C C AUTION AUTION : Remember that velocity is a VECTOR, and has both direction and magnitude Note v P = 0 (at rest) is just a particular case. Note v P = Y a P = 0 4 [©2008 RJ Bieniek] C HANGES IN V ELOCITY C Stopping an object changes its velocity

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Lec-05 - NEWTON'S FIRST AND SECOND LAWS OF MOTION Learning...

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