Question

A gas filled balloon moves up. Is the upward force action on it large or smaller

Answer 1

When helium gas is filled , this phenomenon is observed.

Here helium is a lighter gas than the atmosphere near the crust. So the gas tends to move up to a lighter atmospheric region. This upward force is gien by atmosphere and is = 1atm pressure. That is how much the air above us exerts on us.

Hope it helps..

Answer 2

Answer:

as the air inside it is lighter than the air around us so it rises up but mostly the upward force is acting upon it