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
Arte-miy333 [17]
3 years ago
10

A rotating door is made from four rectangular sections, as indicated in the drawing. the mass of each section is 86 kg. a person

pushes on the outer edge of one section with a force of f = 80 n that is directed perpendicular to the section. determine the magnitude of the door's angular acceleration.
Physics
1 answer:
Drupady [299]3 years ago
8 0
The moment of inertia about the axis will be given by the formula;
 I0=(1/3)mh², where m is the mass of a section and h is the distance to outer edge.
Therefore, with four sections combined the inertia will be;

         4×I0 = (4/3)mh²
But Tor(M)que applied to the door is 
Torque = F × h
Therefore, 
M = I0 × x
x = M/I0   (But M =Fh
  = (Fh)/(4/3 × mh² ( simplifying the equation)
  = 3F/4mh
 but F = 80 N, m= 86 kg and i assume the height is 1.2 m

 Therefore; 
                  = (3×80)/(4×86×1.2)
                  = 0.581 rad/s²

You might be interested in
In----- theory, the actual wishes that are threatening to the dreamers conscious awareness are disguised
Mandarinka [93]

Answer:

Unconscious wish fulfillment

Explanation:

Unconscious wish fulfillment

(In the unconscious wish fulfillment theory, the actual wishes of the dreamer that are threatening to the dreamer's conscious awareness are disguised.)

7 0
3 years ago
the roque requried to turn the crank on an ice cream maker is 4.50 N.m how much work does it take to turn the crank through 300
Alexus [3.1K]

Answer:

the work required to turn the crank at the given revolutions is 8,483.4 J

Explanation:

Given;

torque required to turn the crank, T = 4.50 N.m

number of revolutions, = 300 turns

The work required to turn the crank is given as;

W = 2πT

W = 2 x 3.142 x 4.5

W = 28.278 J

1 revolution = 28.278 J

300 revlotions = ?

= 300 x 28.278 J

= 8,483.4 J

Therefore, the work required to turn the crank at the given revolutions is 8,483.4 J

4 0
3 years ago
To become positively charged an átom must
Ivanshal [37]

Lose electrons because they have a negative charge.

7 0
3 years ago
Read 2 more answers
Three collinear forces,F1=45N west,F2=63N east and an unknown force F3 are applied to an object.The resultant force of the three
Greeley [361]

Take east to be the positive direction. Then the resultant force from adding <em>F</em>₁ and <em>F</em>₂ is

<em>F</em>₁ + <em>F</em>₂ = (-45 N) + 63 N = 18 N

which is positive, so it's directed east.

To this we add a third force <em>F</em>₃ such that the resultant is 12 N pointing west, making it negative, so that

18 N + <em>F</em>₃ = -12 N

<em>F</em>₃ = -30 N

So <em>F</em>₃ has a magnitude of 30 N and points west.

6 0
3 years ago
Describe a well-known hypothesis that was discarded because it was found to be untrue.earth-centered model of the universe. the
polet [3.4K]
The widely accepted hypothesis before that turned out wrong was the Earth-Centered theory or the Geocentric Theory. This was proposed by the philosopher Ptolemy. He came about to this hypothesis from hi observation that from the Earth's perspective, the celestial bodies like the Sun, stars and the moon, look like they rotate around the Earth each day and night. However, this was disproved by Galileo Galelei by his Heliocentric Theory. He observed through the telescope that the Venus also changes phases like the moon. However, he deduced that this is not possible from the positions of the Venus, Earth, Moon and Sun. 
6 0
3 years ago
Other questions:
  • A plane is flying horizontally with speed 292 m/s at a height 3880 m above the ground, when a package is dropped from the plane.
    11·1 answer
  • Can anyone explain the seasons of the earth?
    7·1 answer
  • For parallel and series circuits with the same resistances and voltage; the series circuit has a smaller total current. True or
    11·1 answer
  • Divers in Acapulco, Mexico, leap from a point 36m above the sea. What is the velocity when they enter the water? V = distance /
    8·2 answers
  • Una tractomula se desplaza con rapidez de 69 km/h. Cuando el conductor ve una vaca atravesada enmedio de la carretera, acciona l
    6·1 answer
  • A 60 kg student is standing atop a spring in an elevator that is accelerating upward at 3.0 m/s2. The spring constant is 2.5 x 1
    13·1 answer
  • Complete the statement below with all that apply.<br><br> Average speed is what?
    15·2 answers
  • 6. A car travels a distance of 10 miles in 2 minutes towards 695 north east. 3 points
    15·1 answer
  • Think about a situation at school where you or someone you know
    10·1 answer
  • A child has fallen while riding a bike. When should a bystander call 911 ?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!