1. After the collision, their velocities have switched. This is Newton's third law of motion.
2. The total momentum is conserved.
3. The same thing would happen if the collision is totally elastic.
For 4 and 5.
Using the conservation of momentum equation
m1v1 + m2v2 = m1'v1' + m2'v2'<span />
The answer is <span>Newton’s</span> 2nd law. Thank you!
I think that the downstairs would be faster because the water wouldn't have to go all the way up which make it slower
This is a ball and socket joint.
