Q. Assume a 64 kg boy and a 42 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3 m/s2, find out the magnitude of the acceleration of the boy toward girl.
Q. On your wedding day your lover gives you a gold ring of mass 3.80g. Fifty years later its mass is 3.35g. As an average, how various atoms were abraded from the ring during each second of your marriage?