Rotating coordinate system, velocity

Click For Summary
SUMMARY

The discussion focuses on calculating the velocity vector \( v_0 \) in a rotating coordinate system defined by the position vector \( r_0(t) = (t + 1) i_0 + t^2 j_0 \) and angular velocity \( \omega = tk = tk_0 \). The fixed coordinate system is aligned with the z-axis of the moving system, which rotates about this axis. To find \( v_0 \), it is essential to differentiate the position vector while also accounting for the time-dependent unit vectors in the rotating frame.

PREREQUISITES
  • Understanding of rotational dynamics and coordinate transformations
  • Familiarity with vector calculus, particularly differentiation of vector functions
  • Knowledge of angular velocity and its representation in physics
  • Basic concepts of reference frames in classical mechanics
NEXT STEPS
  • Study the differentiation of unit vectors in rotating frames
  • Learn about the Coriolis effect and its implications in rotating systems
  • Explore the mathematical formulation of angular velocity in three dimensions
  • Review classical mechanics resources, specifically section 1.8 of the provided link for deeper insights
USEFUL FOR

Students and professionals in physics, particularly those studying classical mechanics, as well as educators looking for practical examples of rotating coordinate systems and their applications.

lemonsare
Messages
3
Reaction score
0

Homework Statement



Two coordinate systems xyz (…fixed) and x0y0z0 (moving) coincide at time t = 0.
The moving system is rotating about the …fixed z axis, which coincides with z0 axis. The angular velocity is given by ω = tk = tk0. The position vector as measured in the rotational frame is equal to
r0 (t) = (t + 1) i0 + t^2 j0:
1. Using the rotating frame …find v0.

Homework Equations



ω = tk = tk0
r0 (t) = (t + 1) i0 + t^2 j0

The Attempt at a Solution



So i know to find v0, i cannot just differentiate r0. but i am stuck.
 
Physics news on Phys.org
Welcome to PF;
v0 is the velocity in the rotating reference frame?
r0 is the position in the rotating frame wrt time?

You also need to differentiate the unit vectors.
See: http://home.comcast.net/~szemengtan/ClassicalMechanics/SingleParticle.pdf
section 1.8 (p15)
 
Last edited by a moderator:

Similar threads

Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 5 ·
Replies
5
Views
12K
Replies
4
Views
2K
  • · Replies 20 ·
Replies
20
Views
2K
  • · Replies 22 ·
Replies
22
Views
1K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K