A fish tank with water, with a density of 1.0×103 m3kg, weighs 150 N on a scale. A 30-N plastic toy, with a density of 1.4×103 m3kg, is suspended in the water by a string, not touching the bottom. Determine the new scale reading when the toy is fully submerged. Hint: Draw two free-body diagrams: one for the toy (weight, tension, buoyant force) and one for the tank + water + toy system (forces affecting the scale).
![](https://static.studychannel.pearsonprd.tech/courses/physics/thumbnails/3d357ef1-50c9-44d8-a95e-b83de7cee68e)