Doubtclip is an AI tutor that turns any homework or exam doubt into a step-by-step whiteboard video lesson with diagrams, formulas, and voice explanation.

Which subjects and exams does it support?

It supports Physics, Chemistry, Mathematics/Calculus and related STEM doubts for school boards, JEE, NEET, and global high-school / undergrad practice.

How do I get a video solution?

Upload a photo of the question or paste the text, sign in, and Doubtclip generates a whiteboard-style explanation video you can watch and share.

Is Doubtclip available worldwide?

Yes. Doubtclip is a web app for students globally. Lessons are available in English and Hinglish.

Fluid Mechanics

NEET level, single correct, medium

2 of 192

Question 2 of 192

Raindrops attain a constant terminal velocity due to:

Show answer and solution

Answer: (A) Viscous force of air

Viscous drag force balances net downward gravitational force, leading to constant terminal velocity.

NEET question paper PDF

The full paper for each year. Open it on this page or download it.

NEET 2025 question paper (Code 45)

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.

See it move: Fluid mechanics simulationDrag the sliders and watch the numbers in this question change.

More Physics practice

Fluid MechanicsWater flows through a horizontal pipe of non-uniform cross-section. At point $A$ the velocity is $2\,\text{m/s}$ and pressure is $P_A$ . At point $B$ , where diameter is halved, velocity is:
Fluid MechanicsWater flows out of a small hole of area $a$ at the base of a large cylindrical tank of cross-sectional area $A$ filled to height $H$ . Time taken to empty the tank completely is:
Fluid MechanicsA spherical ball of radius $r$ falls with terminal velocity $v$ in a viscous liquid. The viscous drag force acting on the ball is proportional to:
Fluid MechanicsAn air bubble of volume $2.9 \mathrm{~cm}^{3}$ rises from the bottom of a swimming pool of 5 m deep. At the bottom of the pool water temperature is $17^{\circ} \mathrm{C}$ . The volume of the bubble when it reaches the surface, where the water temperature is $27^{\circ} \mathrm{C}$ , is $\_\_\_\_$ $\mathrm{cm}^{3}$ .
$\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right.$ , density of water $=10^{3} \mathrm{~kg} / \mathrm{m}^{3}$ , and 1 atm pressure is $\left.10^{5} \mathrm{~Pa}\right)$
Fluid MechanicsA plane is in level flight at constant speed and each of its two wings has an area of $40{m}^{2}.$ If the speed of the air is $180km{h}^{-1}$ over the lower wing surface and $252km{h}^{-1}$ over the upper wing surface, the mass of the plane is ________ $kg.$ (Take air density to be $1kg{m}^{–3}$ and $g=10m{s}^{–2}$ )
Fluid MechanicsGiven below are two statements:
Statement I : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water.
Statement II : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water.
In the light of the above statements, choose the most appropriate from the options given below

NEET Physics practice question on Fluid Mechanics, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.