Physics Challenge Question 2: Displacement and velocity
Physics Challenge Question 2: Displacement and velocity
Due in class 9/22/2008
A squirrel is running along a fence. Mr. Jensen, curious about squirrel velocities, has shrewdly observed at which fence post the squirrel is located at one-second intervals. After the squirrel has run away, Mr. Jensen measures the spacing between two adjacent fence posts to be 5 ft.
Time: 0.0 sec 1.0 sec 2.0 sec 3.0 sec 4.0 sec 5.0 sec 6.0 sec
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Distance: 0.0 ft 5.0 ft 15 ft 25 ft 35 ft 55 ft 60 ft
Velocity:
Question 1:
Based on his observations, Mr. Jensen estimates the squirrel’s velocity between measurements. (Fill in your estimates in the boxes above, using an appropriate number of significant figures.)
Question 2:
By taking the average of the above velocities, calculate the squirrel’s average velocity over the entire 6 seconds.
Question 3:
Do you need all 7 measurements to determine the squirrel’s average velocity over the entire 6 seconds, or could you do it with only two? Which two would you use? Do you get the same result as in question 2?
Question 4:
Convert your answers from questions 2 and 3 to appropriate SI units.
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