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algol [13]
4 years ago
10

100 POINTS. PLEASE EXPLAIN YOUR ANSWER.

Physics
1 answer:
Drupady [299]4 years ago
6 0

Explanation:

Draw free body diagrams for each mass.

There are 3 forces on the disk: weight force mg pulling down, normal force N pushing up, and tension force T pulling right.

There are 2 forces on the cylinder: tension force T pulling up and weight force 3mg pulling down.

Sum of forces on the disk in the centripetal direction:

∑F = ma

T = m v²/r

Sum of forces on the cylinder in the vertical direction:

∑F = ma

T − 3mg = 0

T = 3mg

Substituting:

3mg = m v²/r

3gr = v²

v = √(3gr)

Plug in values:

v = √(3 × 10 m/s² × 0.800 m)

v = √24 m/s

v ≈ 4.90 m/s

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Different star constellations are visible from Earth at different seasons of the year.

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Do 10 grams of oxygen atoms and 10 grams of iron atoms contain the same number of particles
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Name the principle in which rocket work.
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8 0
3 years ago
 An ultrasound pulse used in medical imaging has a frequency of 5 MHz and a pulse width of 0.5 us. Ap- proximately how many osci
podryga [215]

At the frequency of 5 MHz, the period of the oscillations is 1/5meg. That's a period of 1/5 microsecond.

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4 0
3 years ago
If the index of refraction for a certain glass is 1.5, and the angle of refraction is 15 degrees for a ray of light
LiRa [457]

Answer:

\theta_i = 23^o

Explanation:

The refractive index of a medium is given by the following formula:

\eta = \frac{Sin\theta_i}{Sin\theta_r}

where,

η = refractive index = 1.5

\theta_i = angle of incidence = ?

\theta_r = angle of refraction = 15°

Therefore,

1.5 = \frac{Sin\theta_i}{Sin15^o}\\\\Sin\theta_i=(1.5)Sin15^o\\\\\theta_i = Sin^{-1}(0.388)\\\\

\theta_i = 23^o

4 0
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