Recent content by Juanmdq

Thanks Russ! two questions: To calculate the force when the weight is going down? When you consider the time that it takes to move the mass? thanks!

Hi everyone! I know this is probably a really easy problem for you guys but I want to estimate how much energy a person uses when it goes to the gym. The joules or watts needed to move the weight. Let's say for example when a person is doing overhead press and lifts 50kg 40cm up and then 40cm...

Thanks Rive!

The most efficient way is if that piston alone could be used to make the device both sink and then refloat. Im not sure what do you mean but it sounds intersting. I thought to use a piston that would push the water out while at the same time let air in from the surface with a hose in a...

Thank you all for taking the time to answer! I really do appreciate it!

Thanks Andrew! Great response! Do you mind a follow up question? Let's say I start pumping air from the surface to the bottom 100m deep. Does the force I need to send it down will increase with depth? Also once I start filling the ball , since it would be open at the bottom to let the water...

Hi Everybody! Lets say I have a sphere or an elipsoid of 10m3 full of air so it floats. I then open a valve that let's water in. At some point it will start to sink to the bottom. Let's say 100m deep. Once its down there I would like to refloat it. Which should be the most efficient method...