1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
julsineya [31]
3 years ago
11

The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 10.0 s. At th

is point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 12.0 s. Through how many revolutions does the tub turn during this 22 s interval? Assume constant angular acceleration while it is starting and stopping.
Physics
1 answer:
Arte-miy333 [17]3 years ago
6 0

Answer:

22 revolutions

Explanation:

2 rev/s = 2*(2π rad/rev) = 12.57 rad/s

The angular acceleration when it starting

\alpha_a = \frac{\Delta \omega}{\Delta t} = \frac{12.57}{10} = 1.257 rad/s^2

The angular acceleration when it stopping:

\alpha_o = \frac{\Delta \omega}{\Delta t} = \frac{-12.57}{12} = -1.05 rad/s^2

The angular distance it covers when starting from rest:

\omega^2 - 0^2 = 2\alpha_a\theta_a

\theta_a = \frac{\omega^2}{2\alpha_a} = \frac{12.57^2}{2*1.257} = 62.8 rad

The angular distance it covers when coming to complete stop:

0 - \omega^2 = 2\alpha_o\theta_o

\theta_o = \frac{-\omega^2}{2\alpha_o} = \frac{-12.57^2}{2*(-1.05)} = 75.4 rad

So the total angular distance it covers within 22 s is 62.8 + 75.4 = 138.23 rad or 138.23 / (2π) = 22 revolutions

You might be interested in
A block of metal is 3 cm on each side. It has a mass of 283.5 grams. What is the density of the metal.
Luden [163]
Density =  \frac{Mass}{Volume}
\\\rho=\frac{m}{V}
\\\\\rho=\frac{283.5}{3^3}
\\\\\rho=\frac{283.5}{27}
\\\\\rho = 10.5  g/cm^3

5 0
3 years ago
How do you spend a dime and get back a penny
topjm [15]
Is your daughter doing this is the same time as I do you like you can
8 0
3 years ago
A traveler covers a distance of 413 miles in a time of 7 hours. What is the average speed for his trip?
Nina [5.8K]

Answer:

59/mph.

Explanation:

We just have to divide the number of miles, by the amount of time it took. 413 miles / 7 hours = 59 miles per hour.

7 0
3 years ago
Which of the following would a geologist rely on to get data about nutrients cycle in the water
Novosadov [1.4K]
The answer would be : <span>hydrologists.

Hope this helps !

Photon</span>
8 0
3 years ago
Read 2 more answers
A uniform, solid, 1800.0 kgkg sphere has a radius of 5.00 mm. Find the gravitational force this sphere exerts on a 2.30 kgkg poi
iVinArrow [24]

Answer

given,

Mass of the solid sphere = 1800 Kg

radius of the sphere,R = 5 m

mass of the small sphere, m = 2.30 Kg

when the Point is outside the sphere the Force between them is equal to

      F = \dfrac{GMm}{r^2}   when r>R

When Point is inside the Sphere

      F = \dfrac{GMm}{R^2}\ \dfrac{r}{R}  when r<R

where r is the distance where the point mass is placed form the center

Now Force calculation

a) r = 5.05 m

       F = \dfrac{GMm}{r^2}[/tex]

       F = \dfrac{6.67\times 10^{-11}\times 1800\times 2.3}{5.05^2}

               F = 1.082 x 10⁻⁸ N

b) r = 2.65 m

      F = \dfrac{GMm}{R^2}\ \dfrac{r}{R}

      F = \dfrac{6.67\times 10^{-11}\times 1800\times 2.3}{5.05^2}\ \dfrac{2.65}{5.05}

     F = 5.68\times 10^{-9}\ N

3 0
3 years ago
Other questions:
  • The football player running toward the goal line has
    5·1 answer
  • Cool the matter back down to a solid state. How does its shape compare to its original shape?Why? *
    8·1 answer
  • What property is used to distinguish the layers of the atmosphere?
    10·2 answers
  • Which shapes / structures are more stable?
    12·2 answers
  • Why are atoms electrically neutral?
    8·1 answer
  • What are some of the difficulties with measuring the volume of a gas? Select all that apply.
    8·1 answer
  • Newton's first law of motion states that an object at rest or moving with constant velocity will remain that way until it is act
    9·1 answer
  • A circuit has a current of 1.2 A. If the voltage decreases to one-third of its original amount while the resistance remains
    11·1 answer
  • 1. You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you at 44.2 m/s from behind a
    11·1 answer
  • HURRY 20 POINTS <br><br><br> Why is it important to include exercise in your daily routine?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!