Which statement is true? The speed of sound in air is inversely proportional to the temperature of the air. The speed of sound i
2 answers:
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Answer:
.
Explanation:
The mechanical energy of the system will be the kinetic energy plus the elastic potential energy: .
We know that the equation for the kinetic energy is , where <em>m </em>is the mass of the object and <em>v </em>its velocity.
We know that the equation for the elastic potential energy is , where <em>k</em> is the spring constant and
the compression (or elongation) respect to equilibrium.
So for our values we have:
.
Answer
given,
initial speed of merry-go-round = 0 rad/s
final speed of merry-go-round = 1.5 rad/s
time = 7 s
Radius of the disk = 6 m
Mass of the merry-go-round = 25000 Kg
Moment of inertia of the disk
I = 450000 kg.m²
angular acceleration
we know,