1. A 40-cm-diameter sphere is released from rest under water. If it weighs 380 N in air, what is its initial acceleration under water if the added mass is neglected? If the added mass is included?
2. A 20-cm-diameter 4-m-long horizontal cylinder is released from rest under water. If it weighs 1500 N in air, what is its initial acceleration under water if the added mass is neglected? If the added mass is included?