WorksheetsA Level Physics Quiz. Materials, Fluids: Viscosity
Total questions: 15
Worksheet time: 11mins
What is the unit of viscosity η in the SI system?
Pascal-second
Newton-meter
Joule
Watt
What force is responsible for an object's buoyancy when submerged in a fluid?
Gravitational Force
Electrostatic Force
Magnetic Force
Upthrust
Which of the following objects would experience the most viscous drag when moving through the same fluid at the same speed?
A small pebble
A large pebble
A feather
They would all experience the same viscous drag
Stokes' Law relates to which three quantities?
Diameter of the sphere, viscosity of the fluid, and terminal velocity.
Diameter of the sphere, pressure, and terminal velocity.
Pressure, viscosity of the fluid, and density of the fluid.
Terminal velocity, density of the fluid, and temperature.
Thixotropy is a characteristic of certain types of fluids that...
...solidify when pressure is applied.
...become less viscous when disturbed or agitated.
...become more viscous when disturbed or agitated.
...have constant viscosity despite being disturbed.
What is the upthrust experienced by a body immersed in a fluid dependent on?
the density of the fluid
the volume of the fluid displaced
the acceleration due to gravity
all of the above
According to Stokes' law, if the radius of a small spherical object moving in a viscous medium doubles, how will this affect the viscosity η?
It will halve.
It will double.
It will quadruple.
It will remain the same.
How does an increase in temperature generally affect the viscosity of a liquid?
increases viscosity
decreases viscosity
no effect on viscosity
depends on the type of liquid
How does speed affect viscous drag on an object moving through a fluid?
viscous drag increases as speed increases
viscous drag decreases as speed increases
viscous drag remains constant regardless of speed
viscous drag is not related to speed
Archimedes' principle is closely related to which concept in fluid mechanics?
viscosity
stokes' law
thixotropy
upthrust
What does Archimedes' principle state about an object fully submerged in a fluid?
It displaces its own weight in fluid.
It displaces its own volume in fluid.
It displaces fluid equal to its own density.
It displaces fluid with the same viscosity as itself.
A thixotropic fluid is likely to flow more readily when...
...heated.
...cooled.
...stirred or shaken.
...placed under vacuum.
In Stokes' Law, if the terminal velocity of an object is known, which of the following can be directly calculated?
mass of the object
size of the object
fluid dynamic viscosity
kinetic energy of the object
Stokes' Law is typically applied to objects moving in a fluid that are...
...very large.
...very small.
...very dense.
...very light.
If a fluid shows a decrease in viscosity with time at a constant rate of shear, it is said to be...
...rheopectic.
...thixotropic.
...plastic.
