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Stells [14]
3 years ago
11

In order to be considered work, the components that must be present are?..

Physics
2 answers:
AVprozaik [17]3 years ago
5 0
I think the answer is A.
mr_godi [17]3 years ago
4 0

If you need to be sure about this answer don't be I just took the test and this one was correct.

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A child bounces in a harness suspended from a door frame by three elastic bands. If each elastic band stretches 0.300 m while su
WINSTONCH [101]

Answer:

The force constant for each elastic band is 77.93 N/m

Explanation:

Hooke's law of a spring or an elastic band gives the relation between elastic force (Fe) and stretching (x), the magnitude of that force is:

F_{e}= kx (1)

With k, the elastic force constant. The three elastic bands support the child’s weight (W) and maintain him at rest, so by Newton’s second law for one of the elastic bands:

\sum F=0 (2)

\frac{W}{3}-F_{e}=0\Rightarrow F_{e}=\frac{W}{3} (3)

Using (1) on (3):

kx=\frac{W}{3}\Rightarrow k=\frac{mg}{3x}(4)

k=\frac{7.15\,kg*9.81\,\frac{m}{s^{2}}}{3*0.300\,m}\simeq\mathbf{77.93\frac{N}{m}}

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3 years ago
How dose silicon shape our technological reality?
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The relationship between electricity and magnetism is called what
Leno4ka [110]
The relationship between electricity and magnetism is called<span> electromagnetism.</span>
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Why doesn't the skater ever regain his potential energy? ​
lina2011 [118]

Answer:

potential energy is stored energy...basically energy gathered from staying still so because the skater is in motion he has lost the potential energy and turned it into kinetic energy

Explanation:

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What layer the atmosphere do you think is of greatest interest to meteorologists?
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