phetsims / buoyancy

"Buoyancy" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
2 stars 2 forks source link

Weight unevenly distributed between scales #132

Open AgustinVallejo opened 1 month ago

AgustinVallejo commented 1 month ago

I noticed that if you put the two scales next to eachother and place the block in both of them, the pool scale will get like 75% of the block's weigth regardless how it's positioned. See images below, in both cases, the scale with the 15N is the one that started in the pool

Should we do something about this or are we good to ignore it since it's not part of the learning goals?

image

image

DianaTavares commented 1 month ago

I cannot reproduce this bug. When I place the bock over the two scales, the readout only goes crazy. scales

But that also still happening in explore with for example with aluminum:

aluminium

And about the two scales, we can make it simple (because it is not the learning goal) and just divide them between 2, or we can use calculate the value with equilibrium equations. Knowing that the addition of the values of both scales need to be equal to the block's weight, with torques. In that case, you need to know the distance between the scale and the center of mass of the block. What do you think?