All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is

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Q: 45 (NDA-I/2022)
All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,51,21,2,8,51,11

keywords: 

{'buoyancy': [0, 0, 0, 2], 'upward pressure': [0, 0, 0, 2], 'upward force': [0, 0, 0, 2], 'downward pressure': [0, 0, 0, 2], 'downward force': [0, 0, 0, 2], 'fluid': [1, 0, 1, 6], 'objects': [1, 0, 0, 7]}

The correct answer is option 3: an upward force. When an object is immersed in a fluid, it experiences a buoyant force that acts in the opposite direction of gravity. This buoyant force is exerted by the fluid and it is directed upward.

Option 1: a downward force - This is incorrect because buoyancy is an upward force, not a downward force. It opposes the force of gravity acting on the object.

Option 2: a downward pressure - This is incorrect because buoyancy is not a pressure, but rather a force. Pressure is the force per unit area, while buoyancy is the upward force exerted on the object by the fluid.

Option 4: an upward pressure - This is incorrect because, as mentioned earlier, buoyancy is not a pressure but a force. It is important to note the difference between force and pressure.

Buoyancy is an important concept to understand in various fields such as physics, engineering, and fluid dynamics. It plays a significant role in determining the behavior of objects when submerged in fluids, such as in the case of floating or sinking.