A hollow, plastic sphere is held below the surface of afreshwater lake by a cord anchored to the bottom of the lake. Thesphere has a volume of 0.640 m3 and the tension in the cord is 2120N.
a) Draw a free body diagram when sphere is at the bottom.
b) The cord breaks and the sphere rise to the surface. When thesphere comes to rest, what fraction of its volume will besubmerged?
