Prepare for NEET Physics Mechanical Properties Of Fluids (Terminal Velocity) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert insights to analyze when gravitational and viscous forces balance.
NEET Questions / Physics / Mechanical Properties Of Fluids / Terminal Velocity
A small solid sphere of radius 'r' and density 'ρ' falls under gravity in a viscous fluid of density 'σ' and coefficient of viscosity 'η'. If , and the sphere has attained terminal velocity, which of the following changes would result in a decrease in the terminal velocity, assuming all other factors remain constant?
Increasing the viscosity 'η' of the fluid
Decreasing the radius 'r' of the sphere
Increasing the density 'ρ' of the sphere
Decreasing the density 'σ' of the fluid
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.
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
An object falling freely in a vacuum experiences constant acceleration due to gravity. However, an object falling through a fluid eventually reaches a terminal velocity. This difference in behavior is primarily due to:
The change in the gravitational force acting on the object as it falls through the fluid.
The buoyant force exerted by the fluid on the object.
The presence of a resistive force proportional to the object's velocity in the fluid.
The decrease in the object's mass as it falls through the fluid.
A small steel ball and a large steel ball are dropped simultaneously from the same height. Which ball will reach terminal velocity first, assuming air resistance is present?
The small steel ball
The large steel ball
Both will reach at the same time
It depends on the density of steel
Which of the following factors does NOT affect the terminal velocity of a falling object in a fluid?
Mass of the object
Density of the fluid
Cross-sectional area of the object
Initial velocity of the object
When an object reaches terminal velocity, its acceleration is:
0 m/s²
9.8 m/s²
Constant but not 0
Continuously increasing
A skydiver opens her parachute. What happens to her terminal velocity?
It decreases
It increases
It remains the same
It becomes zero
Two objects of the same shape but different sizes are dropped from the same height. Which will experience a greater air resistance force?
The larger object
The smaller object
Both experience the same air resistance
Air resistance is independent of size
