Calculating Coefficient of Restitution for Two Solid Balls Colliding

[nysnacc]

Homework Statement

Homework Equations

M_aV_a1 + M_aV_b1 = M_aV_a2 +M_aV_b2

The Attempt at a Solution

I found V_a2 = 2 m/s

e is found to be 1.75, correct?

 

[Simon Bridge]

Please show your reasoning.

 

[haruspex]

e is found to be 1.75, correct?

e is always from 0 to 1.

 

[nysnacc]

I found it 0.81 something! thanks

 

[haruspex]

I found it 0.81 something! thanks

I make it a bit more. Please post your working.

 

[nysnacc]

e = 0.827 actually

 

[Simon Bridge]

Well done,
For the benifit of others stuck in the same way, please tell us how you got that.