3 years ago

The force that opposes motion to moving parts is _____

Physics

1 answer:

Colt1911 [192]3 years ago

6 0

The force that opposes motion to moving parts is F<span>riction</span><span>

Hope this helped!
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Problem 3) Bob stands at the edge of the swimming pool holding a laser 1.5m above the ground. He shines the red laser beam onto

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Answer:

d = 5.75m

Explanation:

Using snell's law, we have,

n₁ × sin(i) = n₂ × 2 × sin(r)

n1= refractive index of 1st medium= 1

n2= refractive index of 2nd medium = 1.33

r= angle of reflection

therefore,

$r = \sin^{-1}\frac{n_1\sin i}{n_2}$

Here,

i = 90 - θ

$\theta = \tan^-^1(\frac{1.5}{3} )\\\\=26.56^\circ$

$r = \sin^{-1}\frac{n_1\sin i}{n_2}$

$r = \sin^{-1}\frac{(1)\sin (90-26.56)}{1.33}\\\\r = 42.26m$

$\tan r = \frac{2.5}{d_1}$

$d_1 = \frac{2.5}{\tan (42.26)} \\\\d_1 = 2.75m$

Therefore, the distance is

d = 3 + d₁

d = 3 + 2.75

d = 5.75m

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3 years ago

Find the angular momentum of a hollow spinning sphere when its angular speed is 20rad/s. The rotational inertia of the sphere is

zysi [14]

Answer:

L= 0.4 kgm²/s

Explanation:

The angular momentum of a hallow spinning sphere is

L = Iω

L = (0.02kgm²) × (20rad/s)

L= 0.4kgm²/s

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3 years ago

Help please, what does gravitational force do according to these answer choices?

laiz [17]

Answer:

the answer is C

Explanation:

gravity forces down not up or sideways.

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How many atoms are in something determines it "mass"

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1) Choose the answer choice that BEST completes the following sentence.

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1. one-Half

2. Apogee

3. Any object that revolves around another object

4. Venus's gravitation pull

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