In tests on earth a lunar surface exploration vehicle (mass = 5.45 × 103 kg) achieves a forward acceleration of 0.217 m/s2. To achieve this same acceleration on the moon, the vehicle's engines must produce a drive force of 1.50 × 103 N. What is the magnitude of the frictional force that acts on the vehicle on the moon?

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 -

50 meters per 5 seconds

Milliseconds. . . . . .