3 years ago

Order, from smallest to largest, the following objects:

Physics

2 answers:

agasfer [191]3 years ago

8 0

Answer:

Meteorites,Asteroids,Most moons,earth,sun,the milky way,cluster of galaxies

Explanation:

Makovka662 [10]3 years ago

4 0

cluster of galaxies 1

THE MILky way 2

earth 3

most moons 4

most meteorites 5

and most asteroids 6

ur welcome

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A uniform, solid disk with mass m and radius R is pivoted about a horizontal axis through its center. A small object of the same

Alekssandra [29.7K]

Answer:

$\omega=\sqrt{\frac{4g}{3R}}$

Explanation:

According to the law of the conservation of energy, the gravitational potential energy of the physical system will be converted into rotational kinetic energy. So, we have:

$U=K_{rot}\\mgR=\frac{I_s\omega^2}{2}$

$I_s$ Is the moment of inertia of the system, that is the sum of the moments of inertia of the disk and the small object.

$mgR=\frac{(I_d+I_o)\omega^2}{2}\\mgR=\frac{(\frac{mR^2}{2}+mR^2)\omega^2}{2}\\mgR=\frac{(\frac{3}{2}mR^2)\omega^2}{2}\\gR=\frac{3}{4}R^2 \omega^2\\\omega^2=\frac{4g}{3R}\\\omega=\sqrt{\frac{4g}{3R}}$