Put a solid cubic wood block with a length of 10cm on one side into the water, overflow 600g of water from the cup, and calculate the buoyancy, gravity and density of the wood block

Put a solid cubic wood block with a length of 10cm on one side into the water, overflow 600g of water from the cup, and calculate the buoyancy, gravity and density of the wood block

The buoyancy of a wooden block at rest is the gravity of the water discharged
So the buoyancy of the wood block at rest = 600 × 10 / 1000 = 6N
two
Mass of wood block = g / g = 6 / 10 = 0.6kg
The volume of wood block = 10 × 10 × 10 / 1000000 = 0.001M ^ 3
Density of wood block = 0.6 / 0.001 = 600kg / m ^ 3

A wood block with a side length of 10 cm and a density of 0.8 × 10 cubic kg / m. when it floats on the water, how many centimeters below the water is its center of gravity

The center of gravity is five centimeters
The height of underwater part is 0.8 / 1 * 10 = 8
So the center of gravity is 8-5 = 3cm below the water

A square wood block with a density of 0.6 × 10 ~ (#) 179; kg / M ~ (#) 179; and a side length of 10 cm is still on the water surface. The following equations are obtained: (1) the gravity of the wood block; (2) the buoyancy of the wood block; (3) at least how much force must be added on the surface of the wood block to make the wood block completely immersed in water. (g = 10 N / kg)

(1) Gravity g = mg = density * Volume * g
(2) Buoyancy = gravity g
(3)