Single Choice

A balloon filled with hydrogen rises upwards because:

Ahydrogen is an element
Bthe pressure inside the balloon Is greater than the pressure outside
Chydrogen is a colourless gas
Dthe weight of the balloon is less than the weight of the air displaced by it
Correct Answer

Solution

Body moves upward In a fluid If the up thrust experienced by It Is more than the weight of the body.

Since, the weight of balloon Is less than that of displaced air, it experiences an up thrust more than its weight and moves upward.

SIMILAR QUESTIONS

Fluid Mechanics

A piece of wood is held underwater. The up thrust on it is:

Fluid Mechanics

A body weighs $$500 \,g$$ in air and $$300 \,g$$ in water, it implies that upward thrust experienced in water is $$500 \,gm.$$

Fluid Mechanics

What is the scientific name of the 'upward force' acting on an object immersed in a liquid?

Fluid Mechanics

Name these forces: (a) the upward push of water on a submerged object (b) the force which wears away two surfaces as they move over one another (c) the force which pulled the apple off Issac Newton's tree. (d) the force which stops you falling through the floor.

Fluid Mechanics

A body dipped into a liquid experiences an upthrust. State two factors on which upthrust on the body depends.

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