Upthrust, Archimedes' Principle and Floatation

The upward force exerted on a body by the fluid in which it is submerged, is called __________

• Upthrust
• Thrust
• Pressure
• Force

The property of a liquid to exert an upward force on a body immersed in it, is called _________.

• Elasticity
• Floatation
• Submergence
• Buoyancy

If the buoyant force (or upthrust) is less than the weight of the body, the body will __________.

• Float just beneath the water surface
• Float just above the water surface
• Float at a depth of 1 metre
• Sink

The upthrust acts on the body in the upward direction at __________

• Centre of buoyancy
• Centre of gravity of displaced fluid
• Both

When a body is immersed in a liquid, upthrust on it due to liquid is equal to the __________of the liquid displaced by the submerged part of the body.

• pressure
• area
• weight
• volume

Upthrust is equal to _________

• Volume of solid immersed x Density of liquid x Acceleration due to gravity
• Area of solid immersed x Mass of liquid x acceleration due to gravity
• mass of liquid displaced x volume of liquid displaced
• Volume of solid immersed x Density of liquid

Upthrust is equal to the weight of the liquid displaced by the submerged part of the body.

• True
• False

If a body is completely immersed in liquid, the volume of liquid displaced will be ________ to the volume of body and upthrust will be __________

• equal, minimum
• less, minimum
• more, maximum
• equal, maximum

The effect of upthrut is that the weight of body immersed in a liquid appears to be __________ its actual weight.

• less than
• more than
• equal to

The volume of liquid displaced by the body is __________ the volume of the submerged part of the body.

• less than
• more than
• equal to