RELATIVE-MOTION ANALYSIS OF TWO PARTICLES USING TRANSLATING AXESToday’s Objectives:Students will be able to:1.Understand translating frames of reference.2.Use translating frames of reference to analyze relative motion.In-Class Activities:•Check Homework, •Reading Quiz•Applications•Relative Position, Velocity and Acceleration•Vector & Graphical Methods•Concept Quiz•Group Problem Solving•Attention Quiz
READING QUIZ1. The velocity of B relative to A is defined asA) vB –vA .B) vA – C) vB + vA .D) vA + vB .vB .2. Since two dimensional vector addition forms a triangle, there can be at most _________ unknowns (either magnitudes and/or directions of the vectors).
APPLICATIONSHere, the boy on the ground is at d = 10 ft
when the girl in the window throws the ball to him. If the boy on the ground is running at a constant speed of 4 ft/s, how fast should the ball be thrown?When you try to hit a moving object, the position, velocity, and acceleration of the object all have to be accounted for by your mind.You are smarter than you thought!