There is a cubic block of wood with density of 0.6 * 10 ^ 3kg / m3 and side length of 10cm immersed in water, as shown in the figure. If the pulling force on the block is 39.2n, the floating force on the block can be calculated The picture shows: a piece of wood suspended in water, 5cm away from the liquid level (in three ways)

There is a cubic block of wood with density of 0.6 * 10 ^ 3kg / m3 and side length of 10cm immersed in water, as shown in the figure. If the pulling force on the block is 39.2n, the floating force on the block can be calculated The picture shows: a piece of wood suspended in water, 5cm away from the liquid level (in three ways)

In the first method, the buoyancy of the wood block immersed in water is: F floating = ρ water GV row = 1.0x10 & sup3; kg / M & sup3; x9.8n/kgx (0.1M) & sup3; = 9.8N. In the second method, the gravity of the wood block is calculated: g = mg = ρ wood GV wood = 0.6x10 & sup3; kg / M & sup3; x9.8n/kgx (0.1M) & sup3; = 5.88n