Angular Velocity: Calculating Revolutions in 4 Seconds

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SUMMARY

The discussion centers on calculating the number of revolutions made by an object given its angular velocity over a time interval of 4 seconds. The area under the angular velocity versus time graph is established as 60, which represents the total angular displacement in radians. To convert this angular displacement to revolutions, the formula 60/2π is utilized, resulting in approximately 9.55 revolutions. The alternative method of summing angular velocities at discrete time intervals (10 for t=1 and 20 for t=2, 3, and 4) totals 70, which is incorrect for calculating revolutions directly.

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  • Understanding of angular velocity and its graphical representation
  • Knowledge of radians and their conversion to revolutions
  • Familiarity with basic calculus concepts, specifically area under a curve
  • Ability to perform unit conversions involving π
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  • Study the relationship between angular displacement and revolutions
  • Learn about calculating areas under curves in physics
  • Explore the concept of angular velocity in rotational dynamics
  • Investigate the use of calculus in physics for motion analysis
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Physics students, educators, and anyone involved in mechanics or rotational dynamics who seeks to understand angular motion and its calculations.

StephenDoty
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How many revolutions does the object make during the first 4 s

well the area under the graph of the angular velocity versus time graph is 60

but I do not know how that helps.

Any help would be appreciated.

Stephen
 

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do you use the 60/2pi for the number of revolutions
or do you use:
10 for t=1
20 for t= 2, 3, and 4
which adds up to be 70?
 

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