Question

MCQ.
1. A weightless balloon contains 200g of water. Its weight in water will be.
(a) 100g (b) 200g (c) 400g.
(d) Zero,

help​

Answer 1

Answer:

b) 200g

Explanation:

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Answer 2

The correct option regarding the weight of the balloon in water is (d) Zero.

• The weight of the object immersed in a fluid is calculated by calculating the buoyant force.
• The amount of buoyant force is explained by the Archimedes principle.
• When a body of weight 'w' is immersed in a fluid such as water then the object immersed in the fluid experiences a loss in weight due to the upward force exerted by the fluid. This upward force is known as buoyant force.
• The amount of water displaced by the object is equal to the volume of the object pushed inside the water. $apparent \: weight = original \: weight - weight \: of \: water \: displaced$
• The weight of the balloon is 200g so, the water displaced by the balloon is also 200g. Also, the upthrust is equal to the weight of the fluid displaced so, the upthrust is 200g.
• Now, $apparent \: weight = 200g - 200g = 0$

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