Question

A hollow plastic cube is held below the surface of a freshwater lake by a cord tied to the bottom of the lake. The cube has sides of length of 0.46 m and the tension in the cord is 730 N. The density of freshwater is 1000 kg/m^3. (a) Draw a free body diagram showing the forces acting on the cube. (b) Find the mass of the cube. (c) A freshwater shark then bites the cord in half, and the cube rises to the surface. When the cube comes to rest, what fraction of its volume will be submerged?

          A hollow plastic cube is held below the surface of a freshwater lake by a cord tied
to the bottom of the lake. The cube has sides of length of 0.46 m and the tension
in the cord is 730 N. The density of freshwater is 1000 kg/m^3.

(a) Draw a free body diagram showing the forces acting on the cube.
(b) Find the mass of the cube.
(c) A freshwater shark then bites the cord in half, and the cube rises to the
surface. When the cube comes to rest, what fraction of its volume will be
submerged?

$A hollow plastic cube is held below the surface of a freshwater lake by a cord tied to the bottom of the lake. The cube has sides of length of 0.46 m and the tension in the cord is 730 N. The density of freshwater is 1000 kg/m^3. (a) Draw a free body diagram showing the forces acting on the cube. (b) Find the mass of the cube. (c) A freshwater shark then bites the cord in half, and the cube rises to the surface. When the cube comes to rest, what fraction of its volume will be submerged?$

Added by Susan C.

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