Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. His
car was 20 meters from the starting line. This took 5 seconds.
What is the car’s average velocity?
4 m/s east
4 m/s west
12 m/s west
12 m/s east
What is the car’s average velocity?
4 m/s east
4 m/s west
12 m/s west
12 m/s east
2 answers:
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g Generally the accepted value of acceleration due to gravity is 9.801
as per the question the acceleration due to gravity is found to be 9.42 in an experiment performed.
the difference between the ideal and observed value is 0.381.
hence the error is -
=3.88735 percent
the error is not so high,so it can be accepted.
now we have to know why this occurs-the equation of time period of the simple pendulum is give as-
As the experiment is done under air resistance,so it will affect to the time period.hence the time period will be more which in turn decreases the value of g.
if this experiment is done in a environment of zero air resistance,we will get the value of g which must be approximately equal to 9.801