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Strange question in mechanics

  • Thread starter PhMichael
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  • #26
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What does a force that's perpendicular to velocity do?
it changes its direction while the magnitude (speed) remains the same.
 
  • #27
vela
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Right, so the force causes [itex]\vec{v}_\parallel[/itex] to die off, but it changes only the direction of [itex]\vec{v}_\perp[/itex] and not its magnitude.
 
  • #28
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but who cares about the direction when we want to calculate the kinetic energy ... All we're interested in is the magnitude of [tex] \vec{v}_{\perp} [/tex].

But how do I continue from this point? This is my main problem.
 
  • #29
ehild
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Determine the initial [tex]
\vec{v}_{\perp}
[/tex] and calculate its magnitude.

ehild
 
  • #30
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thank you all ... I got it :wink:
 

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