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INTERACTIVE LECTURE DEMONSTRATION PREDICTION SHEET-PROJECTILE MOTION Directions: This sheel will be collected. Write your name at the top to record your presence and participation in these demonstrations. Follow your instructor's directions. You may write whatever you wish on the attached Results Sheet and take it with you. Today's physical demonstration involves a ball thrown in the air with an initial velocity upward and to the right. The trajectory of the ball looks approximately like the sketch to the right. Note that the origin of the coordinate system has been chosen to be the initial position of the ball. Demonstration 1: Sketch on the axes on the right your + predictions for the x coordinate of the ball as a function of time and the y coordinate of the ball as a function of time. x coordinate O time Based on your graph of x vs. 1, write a kinematic equation for x as a function of time. y coordinate Based on your graph for y vs. t, write a kinematic time equation for y as a function of time. Question 1: When is the speed of the ball a Question 3: When is the x-component of the maximum? A minimum? velocity a maximum? A minimum? Question 2: At the highest point in its motion, Question 4: When is the y-component of the is the speed of the ball zero? velocity a maximum? A minimum