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Seed 7.1
A ball falls freely from rest at a height of 2 meters. Observations indicate that the ball reaches the ground in .64 seconds.
• Based on this information what is its acceleration?
• 2 meters/ .64 sec = 3.125 meters/sec
You have calculated average velocity, not acceleration.
answer/question/discussion:
• Is this consistent with an observation which concludes that a ball dropped from a height of 5 meters reaches the ground in 1.05 seconds?
• 5 meters/ 1.05 sec = 4. 762 meters/sec
• Yes, the two are consistent with the respective numbers.
answer/question/discussion:
• Are these observations consistent with the accepted value of the acceleration of gravity, which is 9.8 m / s^2?
• Yes, although there was not a height that showed these numbers to be fact in the previous observations
answer/question/discussion:
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15 minutes
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On both questions you calculated average velocity, not acceleration.
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