what is the mass of an object that is experiencing a net force of 225N and an accleration of 3.0 m/s^2. And What is the net force on a cart being pushed with an applied force of 23N with a frictional force of 23N?

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units