Question

Can anyone tell me all formulas of class 9 physics chapterwise? Please​​

Answer 1

physics

ch-1 ( motion)

formulas are

a=v-u/t

v=d/t

equations of motion

v=u+at

s=ut+1/2at^2

v^2-u^2=2as

ch-2 (force)

f=m×a

p=m×v ( momentum=mass×velocity)

miui+m2u2=m1v1+m2v2(conservation of momentum)

ch-3(gravitation)

f=G×m1×m2/r^2

density=mass/volume

relative density= ratio of substance/ratio of water

ch-4(sound)

v=lambda×frequency

frequency=1/time period

v=d/t (velocity=distance/time)

Answer 2

HELLO DEAR FRIEND

$\huge \underline{MOTION }$

1. v = u + at

2. v² = u² + 2as

3. s = ut + 1/2 at²

[ u = initial velocity , v = final velocity.

a = acceleration, t = time, s = distance]

$\huge \underline{FORCE \: AND}$

$\huge \underline{LAWS \: OF \: MOTION }$

1. F = ma

[F = force , a = acceleration ]

$\huge \underline{GRAVITATION }$

$\large{F = G \times \frac{ \large{Mm}}{ \large{ {d}^{2} }} }$

[WHERE, F = gravitational force

G = gravitational constant(6.673×10^-11)

M = mass of Earth, m = mass of object]

$\large{g = G \times \frac{ \large{M}}{ \large{ {d}^{2} }} }$

1. v = u + gt

2. v² = u² + 2gs

3. s = ut + 1/2 gt²

[g = gravitational acceleration

= 9.8m/s²

u = initial velocity , v = final velocity.

, t = time, s = distance]

$\large{P = \frac{ \large{F}}{ \large{ {A}}} }$

WHERE P = PRESSURE, F = force or thrust.

$\large{p = \frac{ \large{M}}{ \large{ {V}}} }$

where, p = density, M = mass of object. V = volume

$\large{relative \: density = \frac{ \large{density \: of \: substance}}{ \large {densty \: of \: water}} }$

$\huge \underline{WORK }$

$\huge \underline{AND \: ENERGY }$

Work = Energy used = Force × distance

$\large{kinetic \: energy = \frac{ \large{1}}{ \large{ {2}}} \times { \large{Mv}}^{2} }$

Where M = mass of object, v = velocity of object

Potential Energy = Mass × gravitational acceleration × height at which object is .

Potential Energy = MgH

$\huge \underline{SOUND }$

1. Velocity = Wavelenght × Frequency

2. Velocity = Frequency × Wavelengh

3. Velocity = (1/Time) × Wavelengh For Echo:

4. Speed of sound = 2 × Distance / Time

HOPE IT HELPS YOU DEAR FRIEND THANKS