Physical Science: Motion, Forces, and Energy, Book M

Section 2: Why do objects float?

Self-Check Quiz-Eng.

1.
The supporting force exerted by a fluid on an object immersed in it is called __________.
A)lift
B)viscosity
C)density
D)buoyant force
2.
An object weighing 50 kg is floating in a fluid. What is the buoyant force of the fluid on the object?
A)> 50 kg
B)< 50 kg
C)Not enough information is given.
D)50 kg
3.
What determines whether an object will sink or float?
A)whether a buoyant force acts on the object
B)whether the buoyant force is larger than the object's weight
C)the direction of the buoyant force on the object
D)whether gravity acts on the object in the fluid
4.
At what depth is the buoyant force on a submerged object the greatest?
A)at the surface
B)at sea level
C)on the ocean floor
D)The buoyant force on a submerged object is the same at any depth.
5.
Archimedes' principle states that __________.
A)pressure applied to a fluid is transmitted unchanged throughout the fluid
B)when the speed of a fluid increases, the pressure exerted by the fluid decreases
C)the buoyant force on an object is greater than the weight of the fluid it displaces
D)the buoyant force on an object is equal to the weight of the fluid it displaces
6.
The __________ of an object is the mass of an object divided by the volume it occupies.
A)density
B)malleability
C)conductivity
D)weight
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