Finding downward force a fish pulls on a fishing line

Question

A hollow plastic spherical bobber of mass 0.0050 kg and volume of 60 cm3 floats on the surface of a lake supporting a submerged fishhook and a bait with a combined mass of 0.010 kg and a combined volume of 1.9 cm3. The density of water is 0.0010 kg/cm3. If a fish grabs the bait, find the minimum downward force, Ffish, it must exert to pull the bobber completely under the surface of the water. You may assume that the apparent weight of the fish is zero, and the fishing line is completely slack.

F = _____N

Answer 1

15g, 61.9mL system of fishing gear

water is 1 gram/mL, so 61.9 - 15 = 46.9 g of buoyancy

46.9 g = .46 N