Question

physics formulas of chapter gravitation and sound

Answer 1

Formulas:-

Gravitation:-

F = G*m1*m2/r²

g = G*M/R²

Equation of motion with gravitaional acceleration:-

1. v = u + gt
2. h = ut + 1/2 gt²
3. v² = u² + 2gh

Equation of motion with gravitaional acceleration (against gravity):-

1. v = u - gt
2. h = ut - 1/2 gt²
3. v² = u² - 2gh

Sound:-

T = 1/ ν
ν = 1/T

v = λ/T
ν = 1/T
speed = frequency*wavelength
v = ν*λ

2d = v*t
t = 2d/v

Answer 2

M1 mass of earth
M2 mass of body on earth
g= gravitational acceleration (  acceleration due to gravity )
F= G M1 X M2 / R^2         
g= GM1 / R^2
F= mg
G= 6.67 x 10^-11  Nm^2 Kg^-2
c = speed of the sound = 343m/s
c= nu X lambda

frequency = 1/ time

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