Arace car completes the final lap of a race on a 2-kilometer circular track. at the start of the lap, it crosses the line at 60 meters/second. it completes the lap 28.57 seconds later, crossing the line at 85 meters/second. calculate the displacement and average acceleration of the car within the span of 12 seconds.

a. displacement is 0 meters, and acceleration is 0.88 meters/second^2.
b. displacement is 2,000 meters, and acceleration is 1.14 meters/second^2.
c. displacement is 0 meters, and acceleration is 70.0 meters/second^2.
d. displacement is 2,000 meters, and acceleration is 80.0 meters/second^2.
e. displacement is 0 meters, and acceleration is 0.70 meters/second^2.

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.