Question

How a hot air balloon is lifted from the ground?

Answer 1

Hii dear here is your answer


A hot air balloon stays on theground (or descends) when the airinside it is too cool. In this case, the weight of the balloon (blue arrow) is greater than the lift (red arrow). ... Hot-air balloons float because the airtrapped inside the balloon is heated up by a burner, making it less dense than the air outside


Hope it's help u

Answer 2

As the air inside is hot it has more intermolecular space than normal air. Therefore, the pressure it applies on the surrounding is less as compared to the atmospheric pressure exerting around it. So it life from the ground until a certain height so as to equalise the pressures between the two.