Physics GK 10 - Floatation

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] F_b = mg
[B] F_b + mg =0
[C] F_b/ mg =1
[D] F_b = 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