SUMMARY
The weight of a hollow sphere underwater, with an average density of 3 g/cm3 and a mass of 120g, is calculated to be 0.8 N. To determine this, the mass must first be converted to SI units, resulting in 0.12 kg. The weight underwater is derived from the net force, which accounts for the downward gravitational force and the upward buoyant force, calculated using the volume of the sphere and the density of water.
PREREQUISITES
- Understanding of basic physics concepts such as density and buoyancy.
- Familiarity with the equations for weight (w=mg) and buoyant force.
- Ability to convert units to SI standards.
- Knowledge of how to calculate the volume of a sphere.
NEXT STEPS
- Learn about Archimedes' principle and its application in buoyancy calculations.
- Study the relationship between density, mass, and volume in fluid mechanics.
- Explore how to calculate the volume of different geometric shapes, including spheres.
- Investigate the effects of varying densities of fluids on buoyant forces.
USEFUL FOR
Students studying physics, educators teaching fluid mechanics, and anyone interested in understanding buoyancy and weight calculations in different mediums.