advertisement

What is the most basic way to describe an object’s motion? Position A description of an object’s location Measuring your Position Distance (d) Displacement (D) The number of steps you How far are you from take … How far did you go? where you started? (Straight line distance) • D = xf - xi When are these quantities the same? When are these quantities different? Units: Meters (m) Practice What distance does Jimmy travel? 17m What is Jimmy’s final displacement? -3m Distance Displacement Scalar Vector magnitude, or just a magnitude and direction number Practice Total distance? Final displacement? If an ant goes around the circle 3 times, what is your total distance and final displacement? Total distance? Final displacement? Pythagorean Theorem Practice Jimmy was lost in a field, he found a bottle labeled “drink me” and then proceeded to stager around the field following this pattern: he travel 12m north, 8 m south, 5m east, 20m north, and finally 5m west. What distance did he travel? What was his final displacement? d= 12+8+5+20+5= • 50m D= 5m 8m 12m 5m 20m = 24m We need to build a triangle we can work with!! First: combine all the up and down vectors Second: combine all the left and right vectors Now build your triangle and put the Pythagorean Theorem to good use! 10 30 25 20 = 65 40 65.76yd Basics Graphs X X t t X X t t Graphing and Using data What does the slope mean? What does the y-intercept mean? Can I write an equation for this line? Practice