Modulus of speed

  • Thread starter dopey9
  • Start date
  • #1
32
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Homework Statement


i just want to know what the modulus of the speed (u) would if


Homework Equations


u = (-2/r)er + (2/r)etheta

The thing is i get confused with the er and etheta ..do these just mean the direction...this topic is fluid mechanics

The Attempt at a Solution


i reckon the answer is square root 8/r ...as i reckon the e's dont get affect...can some one verify this

Homework Statement





Homework Equations





The Attempt at a Solution


Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
1,860
0
The e_r and e_theta are directions in plane polar coordinates.
 

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