Question

7. Three blocks have the same volume but are at slightly different depths in water. Blocks A and C both have a mass of 50 g while block B has a mass of 40 g. Rank in order from largest to smallest the sizes of the buoyant forces FA, FB, and Fc. 50 g a. Fc > FB > FA b. FA > Fp > FC 50 g c. FA = Fc > FB: d. Fc > FA > FB! e. Fa = FB = Fc 40 g 8. A fisherman rows his boat out to his favorite spot on a pond, where he decides to drop a heavy anchor from his boat. When he drops the anchor into the pond, what happens to the level of the pond? a. The level of the pond decreases slightly. b. The level of the pond increases slightly. c. The level of the pond stays the exact same level.

Answer 1

buoyant force = ρ_Lquid *V_submerged * g

here V and ρ_Lquid is same for all boxes and g = 9.8 m/s² so

the buoyant force will be the same on all there box  

Fa = Fb = Fc  

8)

initially, the anchor was on boat and boat have a larger surface area so it displaces more water

when you throw out the anchor in the water, anchor displaces less water so the water level  

decreases slightly