KIN 3309 1nd Edition Lecture 9 Outline of Last Lecture I Human Movement Analysis II Kinematics III Linear Kinematics IV Collection of Kinematic Data V Spatial Reference Systems VI Cartesian Coordinate System VII 2 D Cartesian Coordinate System VIII Two Dimensional Reference System IX Quadrants in a Two Dimensional Reference System X Three Dimensional Reference System XI Three Dimensional Coordinate System XII Vectors and Scalars XIII Vector Magnitude XIV Distance from Origin XV Vector Components XVI Vector Direction XVII Vector Orientation XVIII Vector Orientation Standard XIX Vector Arithmetic XX Example 1a XXI Example 1b XXII Example 1c XXIII Example 1d XXIV Example 2a XXV Example 2b XXVI Example 2c XXVII Example 3 XXVIII Example 4 XXIX Position and Displacement XXX Example 5 XXXI Quiz Outline of Current Lecture These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute I Current Lecture Constant Velocity the xf is very important I Quiz a A sprinter is observed to run 50 meters in 7 5 seconds Calculate the speed of the sprinter in m sec i 50 m 7 5 s 6 67 m s b An individual runs 20 km in 89 minutes What was the average speed in meters per second i 0 27 ii 0 90 iii 3 75 20 89 0 23 km min then 23x 1000 60 3 75 m s iv 225 c During running 100 m a runner runs from the 20 to 30 meter mark in 60 frames of a video record If the video camera recorded data at 50 fps how fast was she running during this interval i 6 5 m s ii 36 m s iii 8 3 m s iv 0 167 m s d A sprinter moving in a straight line at constant velocity starts at a position of 10 meters and finishes at 30 meters in five seconds What is the velocity of the car in meters per second i 4 ii 6 iii 8 iv 2 e During the end of a 100 m race a runners acceleration is negative Which statement accurately interprets this observation i The runner is slowing down while moving in the positive direction ii The runner is speeding up while moving in the negative direction iii The slope of the velocity versus time plot is positive iv The runner is slowing down while moving in the negative direction v Acceleration is negative velocity is negative or constant f A bobsled accelerates from rest at a constant rage of 3 m s 2 How fast is it going after 3 5 seconds i 6 5 m s ii 7 m s iii 9 m s iv 10 5 m s g A triple jumper needs a velocity of 9 2 m s to make a good jump If he is accelerating at 1 65 m s2 how much time does he need to reach the velocity i 4 58 s ii 5 71 s iii 3 5 s iv 5 58 s h A soccer ball is rolling with a constant acceleration a of 0 5 m s2 At ti 0 s the ball has an instantaneous velocity of 6 m s vi After 3 s tf of rolling what would be the velocity vf of the ball i 7 5 m s ii 0 5 m s iii 5 5 m s iv 4 5 m s
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