Free Fall Graphical Method Graphs of distance versus

Free Fall Graphical Method Graphs of distance versus time for both balls are in blue Distance between the balls is in red Ball 1 x, m Ball 2 6 5 4 3 2 1 0 0. 5 1. 0 1. 5 2. 0 2. 5 t, s

Free Fall Motion Diagram method Draw motion diagrams of the two falling objects. Place the motion diagrams side by side and pretend that the second ball is released exactly one time step unit after the first. Is it consistent with your previous prediction? Ball 1 t=0 t=1 t=2 t=3 t=4 t=5 t=6 Ball 2

Free Fall Again 0 t=1 a=g v 9. 8 m/s 2 v = gt t=2 t, s t=3 x x = ½ gt 2 H t=4 t=5 X t, s

X a=g 9. 8 m/s 2 v 0 v = v 0 – gt t=5 t=4 t, s t=3 x t=2 H x = v 0 t – ½ gt 2 t, s t=1 V 0 0 t=0

Two Dimensions Constant Velocity y Vwater Vboat x Vwater

Two Dimensions Constant Velocity + Constant Acceleration

Constant Velocity + Constant Acceleration Projectile Viy y Vi Vix x

Homework (due Monday) Problems Section 2. 6 Freely Falling objects #45, 59, 60, 69 Section 3. 4 Motion in 2 -D # 23, 42

Quiz 1. An elevator moves from the basement to the tenth floor of a building. The mass of the elevator is 1000 kg and it moves as shown in the velocity-time graph below. How far does it move during the first three seconds of motion? 2. The following represents an acceleration graph for an object during a 5 s time interval. Sketch the graph of velocity versus time to represent the object’s motion during the same time interval?