The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 5.0 rev/s in 8.0 s. At this oint, the person doing the laundry open the lid, and a safety switch turns off the washer. The tub slows to rest in 12.0 s. Thru how many revolutions does the tub trun during the entire 20-s interval? Assume constant angular acceleration while it is starting and stopping.

Question

13-01-2020
Physics

contestada

The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 5.0 rev/s in 8.0 s. At this oint, the person doing the laundry open the lid, and a safety switch turns off the washer. The tub slows to rest in 12.0 s. Thru how many revolutions does the tub trun during the entire 20-s interval? Assume constant angular acceleration while it is starting and stopping.

Respuesta :

Otras preguntas

A sample has a hydrogen ion concentration of 1 x 10⁻². What happens if the hydrogen ion concentration increases?a) The hydroxide ion concentration increases.b)

When managers adapt themselves, their subordinates, and their units to change, they are taking up the _____. a) Interpersonal role b) Informational role c) Deci

Which of the following is not a method of improving reliability? Question 76 options: a. Testing b. Providing redundancy c. System design d. Component design e.

On February 1, 2024, Indigo Company purchased 95% of the outstanding common stock of Laura Company and 85% of the outstanding common stock of Kevin Company. Imm

When assessing neuromuscular status, follow these steps:

The moisture content of a potato is 400% on a dry basis. What is its percentage moisture content on a wet basis?A) 40%B) 80%C) 125%D) 800%

Suppose that p(n) is a propositional function. For which positive integers n, p(n) is true if we prove that: is true group of answer choices p(2), p(3), p(4), p

△PBU can be mapped onto triangle, G, Z, D△GZD by a rotation. If m, angle, P, equals, 38, degreesm∠P=38 ∘ , find m, angle, Zm∠Z.

Gayle needs to write a job refusal letter to a recent applicant. Which of the following is the best advice for her? a) Be vague about the reasons for rejection

CarliReifsteck CarliReifsteck · Answer 1 · 2020-01-14T07:23:20+01:00

Answer:

The total number of revolution is 50 rev.

Explanation:

Given that,

Angular speed = 5.0 rev/s

Time = 8.0 s

We need to calculate the angular acceleration

Using equation of angular motion

[tex]\omega_{f}-\omega_{i}=\alpha t[/tex]

Put the value into the formula

[tex]5.0-0=\alpha\times8.0[/tex]

[tex]\alpha=\dfrac{5.0}{8.0}[/tex]

[tex]\alpha=0.625\ rev/s^2[/tex]

We need to calculate the angular displacement

Using equation of angular motion

[tex]\theta=\omega_{i}t+\dfrac{1}{2}\alpha t^2[/tex]

Put the value into the formula

[tex]\theta=0+\dfrac{1}{2}\times0.625\times(8.0)^2[/tex]

[tex]\theta=20\ rev[/tex]

Now, The washer coming to rest from top spin

We need to calculate the angular acceleration

Using equation of angular motion

[tex]\omega_{f}-\omega_{i}=\alpha t[/tex]

[tex]\alpha=\dfrac{\omega_{f}-\omega_{i}}{t}[/tex]

[tex]\alpha=\dfrac{0-5}{12}[/tex]

[tex]\alpha=−0.4167\ rev/s^2[/tex]

We need to calculate the angular displacement

Using formula of displacement

[tex]\theta'=\omega_{i}t+\dfrac{1}{2}\alpha t^2[/tex]

Put the value into the formula

[tex]\theta'=5\times12+\dfrac{1}{2}\times(-0.4167)\times12^2[/tex]

[tex]\theta'=30\ rev[/tex]

We need to calculate the total number of revolution

[tex]\theta''=\theta+\theta'[/tex]

[tex]\theta''=20+30[/tex]

[tex]\theta''=50\ rev[/tex]

Hence, The total number of revolution is 50 rev.