Coefficient of Restitution

  • Thread starter bionut
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  • #1
bionut
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Hi all, I know this may see basic but how would I go about calcualting Impact velovity?

The only information I have is:
Height dropped, height bounced and from here I can calculate the CofR...

But how would I go about finding impact velocity
 

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  • #2
CWatters
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Conservation of energy.
 
  • #3
bionut
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YEs, I thought of that... but don't know the mass of the ball?
 
  • #4
SammyS
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Yes, I thought of that... but don't know the mass of the ball?
Use m for the mass of the ball.


Both KE & PE are proportional to the mass, m.
 
Last edited:
  • #5
hms.tech
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Hi all, I know this may see basic but how would I go about calcualting Impact velovity?

The only information I have is:
Height dropped, height bounced and from here I can calculate the CofR...

But how would I go about finding impact velocity

I don't get the question, i think it is wrong just because there is no need for the Coefficient of Restitution to find the impact (final ) velocity .

The Equations for constant acceleration , once applied would be used to find the Impact velocity AND the rebound velocity
 
  • #6
SammyS
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I don't get the question, i think it is wrong just because there is no need for the Coefficient of Restitution to find the impact (final ) velocity .

The Equations for constant acceleration , once applied would be used to find the Impact velocity AND the rebound velocity
Some mechanical energy is lost in the bounce. Thus there is a coefficient of restitution.
 

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