Four soccer players are running down the field at the same speed. player one weighs 145 pounds and is running toward the north goal, player two weighs 175 pounds and is running toward the south goal, player three weighs 155 pounds and is running towards the south goal and player four weighs 185 pounds and is running towards the north goal. which player has the most momentum

Despite the directions, you can only compare the magnitude among them.

Whichever has the greatest value of the product mass* speed, and since they have the *same* speed, the one with more mass.

185 pounds

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Centrapedial force is the answer