Buoyancy Practice Problems: Set 1

1) If a chunk of Lead (Pb) with a volume of 0.120 m3 and a density of 11 x 103 kg/m3 is released underwater what will be the net force acting on it?

2) If an air filled balloon with a radius of 0.50 meters and negligible mass is released underwater what will be the net force acting on it?

3) If a wood block with a volume of 0.15 m3 and a mass of 10 kg is tied to the bottom of a pool and then released underwater, what will the tension in the rope be if the block is motionless?

(sorry it's up late Li)