# LECTUR~1_12.2 - MEC 1392 DYNAMICS LECTURE 1 SECTION...

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DR. SANISAH SAHARIN (E1-5-2.14) MEC 1392 DYNAMICS LECTURE 1: SECTION 12.1-12.2

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INTRODUCTION & RECTILINEAR KINEMATICS: CONTINUOUS MOTION Today s Objectives: Students will be able to: 1. Find the kinematic quantities (position, displacement, velocity, and acceleration) of a particle traveling along a straight path. In-Class Activities: 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 Group Problems Solving
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? As long as the motion is characterized by the motion of its mass center and any rotation of the body is neglected .

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APPLICATIONS (continued) A sports car travels along a straight road. Can we treat the car as a particle? If the car accelerates at a constant rate, how can we determine its position and velocity at some instant?
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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RECTILINEAR KINEMATICS: CONTINUOUS MOTION (Section 12.2) A particle travels along a straight-line path defined by the coordinate axis s . The total distance traveled by the particle, s T , is a positive scalar that represents the total length of the path over which the particle travels.
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