Physics GK 10 - Floatation

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1).
Who was the first to state the principle of floatation?
2).
What is the upward force experienced by a body, when it is immersed in a fluid, known as?
3).
On which of these factors, the buoyancy depends?
4).
What happens to a body when its density is greater than the density of the fluid?
5).
Which of the following is NOT an application of principle of floatation?
6).
Which of the following represents the condition for floatation?
7).
What happens to a body when its density is equal to the density of the fluid?
8).
What do we call the centre of gravity of the liquid displaced by a body?
9).
Which of the following is equal to the upthrust of the body?
10).
What will be the buoyant force acting on the stone, on being immersed in water, if it displaces 100gms of water?
1. Who was the first to state the principle of floatation?
[A] Isaac Newton
[B] Archimedes
[C] Aristotle
[D] Galileo Galilei
2. What is the upward force experienced by a body, when it is immersed in a fluid, known as?
[A] Tangential force
[B] Buoyant force
[C] Centrifugal force
[D] Hydraulic force
3. On which of these factors, the buoyancy depends?
[A] Density of the fluid
[B] Volume of the body
[C] Both a and b
[D] None of the above
4. What happens to a body when its density is greater than the density of the fluid?
[A] it floats
[B] it sinks
[C] it stays at rest
[D] None of the above
5. Which of the following is NOT an application of principle of floatation?
[A] Ships
[B] Balloons
[C] Submarines
[D] None of the above
6. Which of the following represents the condition for floatation?
[A] Fb = mg
[B] Fb + mg =0
[C] Fb/ mg =1
[D] Fb = mgh
7. What happens to a body when its density is equal to the density of the fluid?
[A] it floats
[B] it sinks
[C] it remains suspended
[D] None of the above
8. What do we call the centre of gravity of the liquid displaced by a body?
[A] fluidic centre
[B] meta-centre
[C] centre of buoyancy
[D] None of the above
9. Which of the following is equal to the upthrust of the body?
[A] mass of body
[B] weight of liquid
[C] weight of liquid displaced
[D] density of liquid
10. What will be the buoyant force acting on the stone, on being immersed in water, if it displaces 100gms of water?
[A] 1000 gm-weight
[B] 100 gm-weight
[C] 10 gm-weight
[D] 1 gm-weight
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