Which combination of shooters and ducks had the greatest potential energy before impact ?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

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.