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gtnhenbr [62]
3 years ago
15

A fisherman is fishing from a bridge and is using a "40.0-N test line." In other words, the line will sustain a maximum force of

40.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in (a) at constant speed and (b) with an acceleration whose magnitude is 2.57 m/s2?
Physics
1 answer:
IRISSAK [1]3 years ago
7 0

To solve this problem we require the concept of Forces given by Newton in his second law. For the particular case where the acceleration is 0 and when there is a change of acceleration.

A) For the first case where the speed is constant we have to

F = mg

Here,

a=0m/s^2

Then,

F= mg

40N = m (9.8)

m = 4.077kg

B) Here we have an acceleration of 2.57m / s ^ 2. When there is acceleration it is considered that the sum of forces is dynamic, for that reason when performing the summation, we have

\sum F = ma

F-mg = ma

T = m(a+g)

40= m(9.8+2.57)

m = 3.23kG

Therefore the heaviest fish that can be pulled up vertically is 3.23KG when there is acceleration but 4.077kg with constant velocity

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siniylev [52]

Answer:

168 seconds (2 min 48 s)

Explanation:

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Power is energy per time.

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Explanation:

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SashulF [63]

Answer:

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Explanation:

The definition of angular momentum is

        L = r x p

Where blacks indicate vectors

Let's apply this definition our case. Linear momentum

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Let's replace

      L = m r x v

The given function is

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We look for speed

     v = dx / dt

     v = 0 + 4.15 j ^

To evaluate the angular momentum one of the best ways is to use determinants

     L = m \left[\begin{array}{ccc}i&j&k\\6&4.15t&0\\0&4.15&0\end{array}\right]

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The other products give zero

Let's calculate

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Answer:

Explanation:

Altitude of the Sun and the latitude position on the earth play an important role in the season change on the earth.

When the altitude of the sun is high then the average temperature of the earth is higher because the luminous intensity of the sun rays is higher due to the focusing of high energy sun rays over a small area.

But when the sun is at higher altitudes we receive less denser rays of the sun and hence we have less heat on the earth on an average.

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