Chapter 2: Motion along a Straight LineIntroductionMotion along a straight line– Motion– Position and Displacement– Average velocity and average speed– Instantaneous velocity and speed– Acceleration – Constant acceleration: A special case– Free fall accelerationMotion Along a Straight Line Everything moves! Classification and comparison of motion D kinematics Simplification– Motion along straight line– Forces cause motion– Moving object is a particle or moves like a particleDisplacementDisplacement is a vectorquantity. It has both a direction and magnitude!Velocity Average velocity Average speed Instantaneous velocityAcceleration Average acceleration Instantaneous acceleration Constant accelerationSample Problem II–2An elevator is initially stationary, then moves upward (which we take the positive direction of x), and then stops. Plot v as a function of time.(a) x(t) curve for an upward moving elevator cab(b) v(t) curve for the cab. Note v = dx/dt!(c) a(t) curve for the cab. Note a =dv/dt!http://webphysics.ph.msstate.edu/Another Look at Constant Acceleration Integration of acceleration Indefinite integral or anti–derivative Constant of integrationYou will learn about this in integral
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