Final speed of two billiard balls

AI Thread Summary
To find the final speed of two billiard balls colliding completely inelastically, the conservation of momentum principle should be applied. The relevant formula involves the masses and initial velocities of both balls. Given that both balls have a mass of 0.5 kg and an initial speed of 2.8 m/s, the final speed can be calculated using the conservation of momentum equation. The discussion confirms that the provided formula is appropriate for solving the problem. Understanding and applying the conservation of momentum is essential for determining the final speed after the collision.
pebbles
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Both have mass of .5 kg and speed of 2.8 m/s; collide completely inelastically

Do I use the conservation of momentum formula? v2= m1/m1 + m2 * v1?

Ugh.
 
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Use conservation of momentum. (Not sure about that formula, though.) Why not post the exact problem?
 
A billiard ball with mass .5 kg has a speed of 2.8 m/s and collides completely inelastically with a ball of same mass.

Find the final speed of two balls.


What formula do you know for the conservation of momentum?
Thanks!
 
The formula you quoted will work fine for this problem.
 
yaaay! ok. that's a lot!
 

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