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Class 5

# Class 5 - 1 1-D Kinematics Acceleration Physics 1301 Fall...

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1-D Kinematics: Acceleration Physics 1301, Fall 2011: Class 5 Tuesday, September 13, 2011 HW Question 6b Tutorial Room Career Fair Today Dark Matter Sept.
3 Objectives: Tuesday, September 13 Kinematics of 1-d Motion; Constant Acceleration Problems in 1-d motion

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4 Demonstrations 1c20.10 Penny & feather 1c20.11 Feather & book 1c20.12 Hammer and feather on moon 1c20.15 Al & plastic balls 1c20.16 Ball & paper
5 Kinematic Graphs Draw a graph. Label the horizontal axis t for time. Label the vertical axis x for distance. Put arbitrary units on the graph: 0 to 5 on both axes Now graph the motion of a person as follows: At t = 0, she starts at x = 3 and stays there for a short interval She then runs to x = 1 and stays there for a short time She then walks slowly back to x = 3

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6 Kinematic Graphs
7 Problem A marathon runner runs at a steady 15 km/h. When the runner is 7.5 km from the finish line, a bird begins flying from the runner to the finish line at 30 km/h. When the bird reaches the finish line, it returns to the runner at the same speed. The bird then continues to fly back and forth between the runner and the finish line until the runner finishes the race. How far does the bird fly (km)?

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8 Gauss Problem What is the sum of all the integers between 0 and 100?
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