1. The problem statement, all variables and given/known data An object is in uniform circular motion. As the time passes by, its mass decreases. ( It has Co2 in it, and it evaporates) What will happen to the object's velocity and angular momentum? 2. Relevant equations F = mV²/r, L = mvr 3. The attempt at a solution Well, I'm trying to figure out if the centripetal force will change. According to the first formula, it seems like it will. ( As the mass of the object decreases). But I do think that maybe the object will increase in order to balance so that the centripetal force won't change. The answer is = V increases, L does not change. Even if the V increases, it'll increase to balance the decrease of mass(Actually, V² will increase proportionally to M, so in all cases angular moment mvr, should decrease) Can anybody help me with this?