Simple rotational motion point problem

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SUMMARY

The discussion centers on the linear speeds of two points on a rotating disk, specifically point A and point B, where point B is located 2.00 times further from the axis of rotation than point A. The linear speed of point A is not V/4, as initially suggested, but rather V/2, since both points complete one rotation in the same time frame. The relationship between their distances from the axis and their respective linear speeds is crucial for understanding rotational motion.

PREREQUISITES
  • Understanding of rotational motion principles
  • Familiarity with linear speed and distance relationships
  • Basic knowledge of circular motion equations
  • Concept of angular velocity
NEXT STEPS
  • Study the equations of motion for rotating bodies
  • Learn about angular velocity and its relationship to linear speed
  • Explore the concept of centripetal acceleration in rotational systems
  • Investigate the effects of varying distances from the axis of rotation on linear speeds
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Physics students, educators, and anyone interested in understanding the dynamics of rotational motion and its applications in real-world scenarios.

kirby27
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Two points are on a disk that rotates about an axis perpendicular to the plane of the disk at its center. Point B is 2.00 times as far from the axis as point A.

If the linear speed of point is V, then the linear speed of point A is

I know the speed of A must be less and i think its V/4. Is this right?
 
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Yes, it is slower, no, it not V/4.

Suppose the distance from the center of the disk to point A is R so the distance from the center to point B is 2R. How far does each travel in one rotation? Remember that the both complete one rotation in the same time.
 
ok. i think its V/2?
 

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