A 50,000-kg train car moving at 2 m/s collides and connects to another identical car initially at rest. –What is the momentum of the first train car before the collision?

–What is the final velocity of the two connected train cars?

-Is the momentum being conserved through out the collision? Explain why.

-Is the kinetic energy being conserved through out the collision? Explain why.

-Is this collision an elastic or inelastic collision? Explain why.

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.