LN_Sec_12-1_12-2 - INTRODUCTION RECTILINEAR KINEMATICS...

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INTRODUCTION & RECTILINEAR KINEMATICS: CONTINUOUS MOTION (Sections 12.1 - 12.2) Today’s Objectives : Students will be able to find the kinematic quantities (position, displacement, velocity, and acceleration) of a particle traveling along a straight path. In-Class Activities : Check homework, if any Reading quiz Applications Relations between s(t), v(t), and a(t) for general rectilinear motion Relations between s(t), v(t), and a(t) when acceleration is constant Concept quiz Group problem solving Attention quiz
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READING QUIZ 1. In dynamics, a particle is assumed to have _________. A) both translation and rotational motions B) only a mass C) a mass but the size and shape cannot be neglected D) no mass or size or shape, it is just a point 2. The average speed is defined as __________. A) r/ t B) s/ t C) s T / t D) None of the above.
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APPLICATIONS The motion of large objects, such as rockets, airplanes, or cars, can often be analyzed as if they were particles. Why? If we measure the altitude of this rocket as a function of time, how can we determine its velocity and acceleration?
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APPLICATIONS (continued) A train travels along a straight length of track. Can we treat the train as a particle? If the train accelerates at a constant rate, how can we determine its position and velocity at some instant?
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An Overview of Mechanics Statics: the study of bodies in equilibrium Dynamics: 1. Kinematics – concerned with the geometric aspects of motion 2. Kinetics - concerned with the forces causing the motion Mechanics: the study of how bodies react to forces acting on them
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POSITION AND DISPLACEMENT A particle travels along a straight-line path defined by the coordinate axis s . The
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LN_Sec_12-1_12-2 - INTRODUCTION RECTILINEAR KINEMATICS...

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