Physics Formulas for Class 11 Chapter 10 Mechanical Properties of Fluids

Here we are providing important Physics Formulas for Class 11 Students. These formulas are useful for every student studying physics. Learning physics formulas is important for exams because they provide a compact and precise way of expressing the fundamental concepts and laws of physics. They allow you to quickly recall the relationships between physical quantities and use them to solve problems. Additionally, many exam questions in physics will require you to apply these formulas, so having a solid understanding of them is crucial for achieving a high score on the exam.

List of all important formulas

Mechanical Properties of Fluids

1) $$F_v=-\eta A \frac{d v}{d t}$$
2) $$\tau={ }^{F_v}=\eta \frac{d v}{d t}$$
3) $$1 \,poise=0.1 \mathrm{~N} . \mathrm{s} / \mathrm{m}^2$$
4) $$F_v=6 \pi \eta r v$$
5) $$F_B=\rho V_{\text {sub }} g \quad ;\rho=density \,of\, liquid$$
6) $$R_e=\frac{\rho V d}{\eta}$$
7) $$V_t=\frac{2 r^2(\sigma-\rho) g}{g \eta}$$
8) $$Q=A V$$
9) Velocity of efflux $$V=\sqrt{2 g h}$$
10) Range of efflux $$R=2 \sqrt{h(H-h)}$$
11) $$Q=A_1 A_2 \sqrt{\frac{2 g h}{A_1^2-A_2^2}}$$

1) Surface Tension $$(\mathrm{T})=\frac{F}{l}$$
2) Name of object → Length
i) Wire → 2ℓ
ii) Ring → 2π
iii) Circular plate → 2πr
iv) Hollow disc → 2πr1+ 2πr2
v) Square plate → 4ℓ
vi) Square frame → 8ℓ
3) $$W \quad T \times \Delta A$$
4) Formation of smaller droplet from bigger $$W=4 \pi T\left[n r^2-R^2\right] \quad \ldots Energy\,absorbed$$ Or
$$
\begin{aligned}
& W=3 V T\left[\begin{array}{ll}
\frac{1}{r}-\frac{1}{R}
\end{array}\right] \\
& \Delta \theta=\frac{3 T}{J S d}\left[\begin{array}{ll}
\frac{1}{r}-\frac{1}{R}
\end{array}\right] \\
\end{aligned}
… Temperature Decreased$$

5) Formation of bigger droplet from smaller $$W=4 \pi T\left[n r^2-R^2\right] \quad \ldots Energy \, released$$ Or
$$\Delta \theta=\frac{3 T}{J S d}\left[\begin{array}{ll}1 & 1 \\ r & R\end{array}\right] \quad \ldots Temperature\,increased$$
6) Excess pressure $$(\Delta P)$$
For droplet and Air bubble inside liquid
$$\Delta P=\frac{2 T}{r} $$
$$\Delta P=\frac{4 T}{r} \ldots For\,bubble$$

7)
$$
h=\frac{2 T \cos \theta}{\rho r g}
$$

Download Books – Exam Special

CBSE Books	ICSE Books
OLYMPIAD Books	FOUNDATION Books
JEE Books	NEET Books

➡ Click below titles to expand