The discussion revolves around calculating the force required to keep a beach ball submerged underwater, focusing on the principles of buoyancy and density. The original poster presents a specific volume for the beach ball and seeks assistance in determining the necessary force.
Some participants have provided insights into the calculations and principles involved, while others are questioning the assumptions made regarding the density of the beach ball and its weight. There is an ongoing exploration of the concepts without a clear consensus on the correctness of the calculations presented.
Participants note that the density of the air-filled beach ball can be neglected for practical purposes, and there is mention of a template for homework questions that may guide the discussion.
This is not correct. Look up Archimedes principle.jsalapide said:I learned that for an object that is completely submerged in a liquid, the density of the object is equal to the density of the liquid.
For all practical purposes, the density of the air filled beach ball can be neglected...that is, assume it has no weight.I used the formula p=m/v to get the mass of the ball. I set p as the density of water which is 1000 kg/m^3.
The buoyancy force is 490N upward. What downward force must be applied to keep the ball completely underwater?The answer I got was 50 kg. Then I multiply it to 9.8 m/s^2 to get the buoyant force.
My answer was 490 N...
Am I correct?