Velocity as a function of radial distance on an elliptical trajectory

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SUMMARY

The discussion focuses on determining the velocity W(m) of a point on an elliptical trajectory described by the vector r=m(a cos(θ), b sin(θ)), where m varies from 0 to 1. The point rotates clockwise at a constant tangential velocity W when m equals 1. Participants explore whether the angular velocity remains constant, akin to circular motion, and emphasize the importance of calculating the time derivative of the position vector to find the magnitude of dr/dt.

PREREQUISITES
  • Understanding of elliptical motion and its mathematical representation
  • Familiarity with vector calculus and derivatives
  • Knowledge of angular velocity and its implications in rotational motion
  • Basic principles of kinematics related to velocity
NEXT STEPS
  • Study the derivation of velocity in elliptical motion using parametric equations
  • Learn about the relationship between angular velocity and tangential velocity in non-circular trajectories
  • Explore the application of calculus in analyzing motion along elliptical paths
  • Investigate the differences between circular and elliptical motion dynamics
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and motion, as well as educators seeking to explain the complexities of elliptical trajectories and their velocities.

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Homework Statement



Assume that a point on an ellipse is described by the vector r=m(a\cos{\theta},b\sin{\theta}), where 0\leq m\leq 1 and that the vector is rotating in the clockwise direction at constant tangential velocity W when m=1.

The problem is to find the velocity W(m).

Also, is the angular velocity constant as it is for circular motion?
 
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Did you take the time derivative of it and then calculate the magnitude of dr/dt?
 

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