Initial Motion Assignment

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Physics Grant HS

Understanding Motion through Graphs

Make graphs of time vs. distance, distance vs. instantaneous velocity and time vs.  instantaneous velocity from the following data about a falling object.  On all three of  these graphs make sure the first variable is on the x­axis.  Use graph paper. Distance  (m) 0 1 2 3 4 5 6 7 8 9 10

Time  (s) 0 0.45 0.64 0.78 0.90. 1.01 1.11 1.20 1.28 1.36 1.43

Vave at given time

Vinst at given time

1. Based on your graphs, 2.  is the instantaneous velocity of a falling object, more directly related to the time it  has fallen or to the distance it has fallen?  Defend your evidence based on your  graphs.

2.  What is the shape of the time vs. distance graph?  How does this graph show that the  object is accelerating as it falls?

Physics Grant HS

Understanding Motion through Graphs

3.  There is a physical constant that is the acceleration due to gravity on earth.  Figure out  what it is based on the data.  (Hint:  Just like velocity is the change in distance/position  per unit of time, acceleration is the change in velocity per unit of time.  This value will  tell you the rate that an object accelerates as it’s falling due to gravity.)

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