Units in physics mode

For an upcoming class, I am trying to figure out units in the physics engine. Trying to demonstrated two spheres colliding - like in a game of pool. However, I am struggling to understand the values (do they have physical units?) of bounciness and friction needed to get a realistic collision - same mass, one ball stopping the other running with the speed of the other one. Here is my attempt - https://cospac.es/v73w

Any help appreciated.

I have the same problems.

The friction is the plane friction coefficient. The bounciness is the coefficient for collisions:
0 means perfectly inelastic collision and 1 - perfectly elastic collision.

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Thank you so much! I have done it https://cospac.es/TM9i

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