Question

A balloon lifting in air follows the following principle

• A. Law of gravitation
• B. Archimedes principle
• C. Principle of buoyancy
• D. All of the above

Answer 1

The correct option is D

All of the above

Lifting of Balloon:

1. The balloon has very lightweight but it still possesses a weight.
2. So the law of gravitation is involved in trying to bring the balloon down hence a downward weight is experienced.
3. In order to balance this downward weight, the buoyant force is acting upward.
4. Since the buoyant force is greater than the weight of the balloon floats above.
5. So the principle of buoyancy is involved.
6. In order to float a volume that is equal to the volume of the balloon is displaced.
7. So, the Archimedes principle is involved.

Hence, the correct answer is option (D).