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Lynna [10]
3 years ago
13

PLZ HELP GUYS PLZ!!!!! The answer is not motion, particles.

Physics
1 answer:
harina [27]3 years ago
4 0

Answer:

Energy

Explanation:

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Playing near a road construction site, a child falls over a barrier and down onto a dirt slope that is angled downward at 33° to
Debora [2.8K]

Answer:

\mu_{k} \approx 0.719

Explanation:

The equations of equilibrium for the child are: (x' in the direction parallel to slope, y' in the direction perpendicular to slope)

\Sigma F_{x'} = m\cdot g \cdot \sin \theta - \mu_{k}\cdot N = m\cdot a\\\Sigma F_{y'} = N - m\cdot g\cdot \cos \theta = 0

After some algebraic manipulation, an expression for the coefficient of kinetic friction is obtained:

m\cdot g\cdot \sin \theta - \mu_{k}\cdot m \cdot g \cos \theta = m \cdot a

g \cdot (\sin \theta - \mu_{k}\cdot \cos \theta) = a

\mu_{k}\cdot \cos \theta = \sin \theta - \frac{a}{g}

\mu_{k} = \frac{1}{\cos \theta}\cdot (\sin \theta - \frac{a}{g} )

\mu_{k} = \frac{1}{\cos 33^{\textdegree}}\cdot \left(\sin 33^{\textdegree}-\frac{(-0.57\,\frac{m}{s^{2}}) }{9.807\,\frac{m}{s^{2}} } \right)

\mu_{k} \approx 0.719

5 0
4 years ago
If you have a mass of 50 kg on <br> Earth, what is your weight in Newtons?
Bond [772]
Weight on any planet is (mass) x (acceleration of gravity there).

Acceleration of gravity on Earth is about 9.8 meters per second² .
So weight of 50 kg on Earth is  (50 x 9.8) = <u>490 newtons</u>.

(That's about  110.2 pounds.)
5 0
3 years ago
Read 2 more answers
The world’s supply of fossil fuels will _____.
Mekhanik [1.2K]

The world’s supply of fossil fuels will dwindle slowly until a replacement source is found that provides the same power.

bc some day we will actually run out of it and find sth that gives power

3 0
3 years ago
Read 2 more answers
How can briquette support to save fossil fuel?​
Marina86 [1]

Answer:

use a reusable source of energy such as hydro power

Explanation:

use renewable energy it saves the environment and does not create global warming

6 0
2 years ago
CO
krek1111 [17]

Answer:0.12 amperes

Explanation:

voltage=17.6v

Resistance=165.5 ohms

Current=voltage ➗ resistance

Current=17.6 ➗ 165.5

Current=0.12 amperes

5 0
3 years ago
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