It has been proposed that north america is moving west at about 2 cm per year. how many kilometers would it move in 5,000 years? (note: 2 cm is a measurement, so apply significant figure rules in your final answer.)

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy