Calculating Impact Velocity Using Coefficient of Restitution

[bionut]

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

 

[CWatters]

Conservation of energy.

 

[bionut]

YEs, I thought of that... but don't know the mass of the ball?

 

[SammyS]

Yes, I thought of that... but don't know the mass of the ball?

Use m for the mass of the ball.

Spoiler

Both KE & PE are proportional to the mass, m.

 

[hms.tech]

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

 

[SammyS]

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.