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
castortr0y [4]
2 years ago
15

An electric fan is running on HIGH. After fan has been running for 1.1 minutes, the LOW button is pushed. The fan slows down to

105 rad/sec in 1.85 seconds. The blades of the fan have a diameter of 6.2 meters and their deceleration rate is 4.4 rad/sec2. 1)What was the initial angular speed of the fan in rev/sec? ωi =
Physics
1 answer:
madam [21]2 years ago
7 0

Answer:

ωi = 15.4 rev/sec

Explanation:

Since the movement of the fan is rotating, we are thus dealing with Rotational motion. In rotational motion, for angular speed to take place also means angular acceleration is also occurring.

angular acceleration = α = (change in speed)/(change in time)

angular acceleration = α = Δw/Δt = (ω - ωi) /(t- t₀) ..........(equation 1)

                                      α =  (ω -ωi) /(t- 0)

                                      α =  (ω-ωi) /t

                                      ωi  =  ω - αt ......................................(equation 2)

where ωi is the initial angular speed.

We replace the values for ω, t and α

ωi = 105 rad/sec - ( 4.4 rad/sec² )(1.85s) = 96.86 rad/s = 15.415747788 rev/sec

You might be interested in
What location on earth experiences the most change the number of daylight hours?
CaHeK987 [17]
<span>The American Southwest and northeastern Africa are the two sunniest regions of the world, with the U.S. city of Yuma, Arizona, taking the crown as the sunniest place on Earth. Yuma, located where the state borders both California and Mexico, receives more than 4,000 sunlight hours per year and averages 11 sunny hours per day over the course of the year. Following closely behind Yuma is another U.S. city -- Phoenix -- which receives an average of 3,872 sunlight hours a year. The third sunniest spot on Earth is Aswan, Egypt, which has an average of 3,863 sunlight hours every year and averages 10.6 sunny hours per day.</span>
3 0
3 years ago
The action of property being taken directly from a person or in that person's presence must be an element in which type of crime
grin007 [14]

B, larceny because that's theft of personal property.

5 0
2 years ago
it took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 miles per hour. How many miles lie
Art [367]

Given:

Time: 3.5 hrs

Velocity: 120 miles/hr

Now Distance=  Speed × Time

Now Velocity and speed have the same magnitude. Velocity being a vector quantity has a definite direction. Whereas speed is a scalar quantity,it indicates only the magnitude an doesn't define any direction.

Hence Distance = Velocity x time

Distance = 3.5 × 120 = 420 miles

7 0
3 years ago
VELOCITY, SPEED, DISTANCE ETC..
vaieri [72.5K]

Answer:

Explanation:

Speed = distance / time

Velocity  = displacement / time

So ,

Speed = 50 km / 0.5 hr = 100 km/h

Velocity  = 40 km / 0.5hr = 80 km/h

4 0
2 years ago
According to Newton's first law, which characteristic of a moving object would remain constant if there were no other
suter [353]
In object in motion stays in motion; speed
8 0
2 years ago
Other questions:
  • LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. A typical LASIK laser emits a 1.
    15·1 answer
  • A baseball pitcher throws a baseball horizontally at a linear speed of 42.5 m/s (about 95 mi/h). Before being caught, the baseba
    12·1 answer
  • April does 1800 J of work to get a canoe moving from rest. April and the canoe have a mass of 70 kg. a. What is the kinetic ener
    14·2 answers
  • A regular atom has a net charge of _____
    12·1 answer
  • You kick a soccer ball with a speed of 18 m/s at an angle of 43. How long does it take the the ball to reach the top of its traj
    5·1 answer
  • Drivers were tested on various driving exercises before they had been drinking. They were given alcoholic beverages of their cho
    13·2 answers
  • How can I show that the sphere of radius R performs a simple harmonic movement. how can i set its reference point and make the f
    10·1 answer
  • Review the vocabulary associated with nuclear and wave therapies
    12·1 answer
  • Calculate the average speed of a runner who runs for 500 meters in 40 second HELP!
    7·1 answer
  • Describe responding Variable
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!