Two identical spheres, A and B, are released simultaneously from the same height in two different viscous liquids. Sphere A reaches terminal velocity faster than sphere B. Which of the following conclusions can be drawn about the liquids?
The liquid in which sphere A falls has a lower viscosity.
The liquid in which sphere A falls has a higher viscosity.
Both liquids have the same viscosity.
The information is insufficient to compare the viscosities.
Related Questions
If two ping pong ball are suspended near each other and a fast stream of air is produced within the space of the balls, the balls
Come nearer to each other
Move away from each other
Remain in their original positions
Move far away
Choose the correct statement(s) for a cricket ball that is spinning clockwise through air
S1 : Streamlines of air are symmetric around the ball
S2 : The velocity of air above the ball relative to it is larger than that below the ball
S3 : The velocity of air above the ball relative to it is smaller than that below the ball
S4 : There is a net upward force on the ball
S1, S2 and S4
S2 and S4
S4 only
S3 only
A steel ball is falling through glycerin. Which of the following factors does not directly affect its terminal velocity?
The radius of the steel ball
The viscosity of glycerin
The density of steel
The height from which it is dropped
A skydiver opens her parachute. What happens to her terminal velocity?
It decreases
It increases
It remains the same
It becomes zero
Aerofils are so designed that the speed of air
On top side is more than on lower side
On top side is less than on lower side
Is same on both sides
Is turbulent
A small sphere of radius is released in a viscous liquid column. Which of the following correctly describes the relationship between the rate of heat production due to viscous forces and the radius of the sphere when the sphere attains its terminal velocity?
Directly proportional to r^5
Inversely proportional to r^2
Directly proportional to r^3
Inversely proportional to r
A raindrop falling through air reaches terminal velocity. At this point, the net force on the raindrop is:
Equal to its weight
Equal to the air resistance
Zero
Greater than its weight
A spherical steel ball of radius falls from rest in a container filled with glycerol. The rate of heat generation due to viscous forces when the ball reaches terminal velocity is proportional to
r
r^2
r^3
r^5
A spherical object falls through a viscous medium. At a certain instant, its velocity is half its terminal velocity. What is the ratio of the net downward force acting on the object at this instant to its weight?
1.0
0.5
0.25
0.75
When an object reaches terminal velocity, its acceleration is:
0 m/s²
9.8 m/s²
Constant but not 0
Continuously increasing
