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ohaa [14]
4 years ago
6

Sebuah pegas memiliki beban 5 kg dan digantung vertikal. Jika pegas tersebut bertambah panjang 7 cm maka perubahan energi potens

ial pegas tersebut adalah…
Physics
2 answers:
devlian [24]4 years ago
7 0

Answer:

Perubahan energi potensial pegas adalah 17.1675 J

Explanation:

Untuk menyelesaikan pertanyaan, kami mencatat bahwa energi potensial elastis diberikan sebagai;

Energi potensial elastis= E_p=\frac{1}{2} \times k \times x^{2}

Dimana:

k = Konstanta pegas

x = perpanjangan musim semi = 7 cm = 0.07 m  

Paksa di musim semi =   -kx

Di mana, pegas adalah satu-satunya objek yang berkontribusi pada gaya yang kita miliki

Memaksa= m×g = 5 × 9.81 = 49.05 N

Karena itu, k = 49.05/0.07 = 700.714 N/m

Oleh karena itu, perubahan energi potensial elastis adalah

E_{p1}=\frac{1}{2} \times k \times x_1^{2}\\E_{p2}=\frac{1}{2} \times k \times x_2^{2}\\\Delta E_p = E_{p2} -E_{p1} = \frac{1}{2} \times k \times x_2^{2} - \frac{1}{2} \times k \times x_1^{2} = \frac{1}{2} \times k \times (x_2^{2} - x_1^{2})

Kami memiliki, x₁ = 0 m karena pegas diasumsikan awalnya tidak diregangkan

Karena itu,

\Delta E_{p}=\frac{1}{2} \times k \times x_2^{2}

\Delta E_{p}=\frac{1}{2} \times 700.714 \times 0.07^{2} = 17.1675 J and

Perubahan energi potensial pegas = 17.1675 J

professor190 [17]4 years ago
5 0

Answer:

It is elastic potential energy

Explanation:

Elastic potential energy is stored energy that results from applying a force to deform an elastic object. The energy is stored until the force is removed and the elastic object returns to its original shape, doing work in the process. Deformation may involve compressing, stretching, or twisting the object. Many objects are specifically designed to store elastic potential energy, for example:

The spring of a winding watch.

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Which occurs at a transform boundary?
andreev551 [17]
The answer is B. One plate slides past another. 

The San Andreas Fault in California and the Alpine Fault in New Zealand are examples of transform boundaries. 

Hope this helps! :)
5 0
3 years ago
A car accelerates uniformly from rest to a speed of 76.8 mi/h in 7.62 s. Find the constant acceleration of the car. Answer in un
Vedmedyk [2.9K]

Acceleration = (change in speed) / (time for the change)

                   =      (76.8 mi/hr)    /       (7.62 sec)

                   =        10.08  mile/hour-second

That quantity is a perfectly good acceleration, it has the right
dimensions etc, but the question asks for it in units of meter/s²,
so I have to convert it to the equivalent in meter/s².

         (10.8  mile / hr-sec) x (1,609 meter/mile) x (1 hr / 3600 sec)

      =   (10.8 · 1,609 · 1) / (3,600)       meter / second²

      =        4.83 meter / second²   if you round all the numbers as you go
or 
                4.51 meter/sec² 
   if you use a calculator and don't round anything    
6 0
3 years ago
Using the force table, components of a vector can be found experimentally by suspending masses from 2 orthogonal strings which o
SCORPION-xisa [38]
Answer: 134.23g at 0° (horizontal) and 77.5g at 90° (vertical).

Explanation:

1) Since the mass of <span>155 g is suspended at 210 degrees, you need to find the components of its weight on the orthogonal coordinate system (0° and 90°).
</span>

<span>2) You do that using the trignometric ratios sine and cosine.
</span>

<span>Weight is mass × g.
</span>
<span>Weight of the object = 155g × g
</span>
<span>Angle, α = 210°
</span>

<span>Horizontal component (0°)
</span>
<span>cosα = horizontal / hypotenuse ⇒ horizontal = hypotenuse × cosα
</span>
⇒ horizontal = 155g × g × cos(210°) = - 134.23g  × g

Vertical component
sinα = vertical / hypotenuse ⇒ vertical = hypotenuse × sinα
⇒ vertical = 155g × g × sin(210°) = -77.5g × g

3) Conclusion:

Therefore, the masses that must be suspended to balance the forces of the 155g mass are 134.23g at 0° (horizontal) and 77.5g at 90° (vertical).




8 0
3 years ago
When do sunspots disappear?
dedylja [7]

Answer:

In 5 years or so, the sun will be awash in sunspots and more prone to violent bursts of magnetic activity.

Explanation

once the magnetic field weakens the area and cold plasma enters the area of the sunspot

8 0
3 years ago
See attachment for the question
weqwewe [10]

The magnitude of force acting on the bumper is 3760 N.

<h3>What is Work energy theorem?</h3>

It states that the Work done in moving a body is equal to the change in kinetic energy of the body

Kinetic energy = 1/2 mv²

Given is a car's bumper designed to withstand 4.32 km/h or 1.2 m/s collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance.

The cushion collapses 0.180 m while bringing 940 kg car to rest from a initial speed of 1.2 m/s

Work done = Force x displacement

As the displacement of the bumper and force acted on it is in same direction, so the work done is

W = Fxcos0° = Fx

The body is coming to rest, so, final velocity is zero. Then, change in kinetic energy will be

ΔK.E = K.Ef - K.Ei

ΔK.E = m/2 (v² - u²)

According to work energy theorem, work done is

W = Fx  = m/2 (v² - u²)

Substitute the value and calculate the force,

F  = [940 x (0² - 1.2²)] / 2x0.180

F = 3760 N

Thus, the magnitude of force is 3760 N.

Learn more about work energy theorem.

brainly.com/question/10063455

#SPJ1

4 0
2 years ago
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