Hey all,
Pls list important equations of cbse class 9
Chapter sound,
Work & energy.
Pls list important equations of cbse class 9
Chapter sound,
Work & energy.
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frequency = number of oscillations / time
v = 1/t
relationship between speed(V) , frequency(v) and wave length
wave velocity = distance covered/ time taken
= wave length / time taken
v= wave length / t
as we know v = 1/t
connecting V and wave length in terms of frequency (v) we can write as
wave velocity = frequency * wave length
work and energy
work done = force on the object * displacement of the object
w = f *s
kinetic energy = 1/2 mv²
mass of the object = m
speed of the object = v
potential energy = mgh
m = mass of the body
g= 9.8m/s²
h = height of the object from ground
power = work/ time
p = w /t