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
Mice21 [21]
3 years ago
15

A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r which rotates about

a vertical axis at a frequency f. a. Determine the angle  where the bead will be in equilibrium – that is, where it will have no tendency to move up or down along the hoop. b. If f = 2.00 rev/s and r = 22.0 cm, what is ? c. Can the bead ride as high as the center of the circle ( = 90º)? Explain.
Physics
1 answer:
Stolb23 [73]3 years ago
5 0

Answer:

Explanation:

The bead is moving on a vertical circular path so it must have a centripetal force towards the centre.

This force is equal to m v² / r

v is velocity of bead and r is radius of the circular path.

The vertical hoop is also rotating about a vertical axis passing through the centre at frequency f so the bead will experience a cetrifugal force due to rotation of the hoop. Its value is

m ω² r . Only at the point o degree and 180 degree , these forces are opposite to each other so at these points , the bead will be in equilibrium .

mv² / r = m ω² r

v² = ω² r²

v = ω r

= 2π f r

= 2 x 3.14 x 2 x 0.22

v = 2.76 m /s

For the bead to rise upto point θ = 90 degree , height achieved is radius R

required velocity = √ 2gR

= √ 2x 9.8x.22

= 2.076 m/s

This velocity is less than the velocity calculated earlier so the bead will be able to ride the required height.

v = 2.76 m/s

You might be interested in
An object is pulled with 20 net of force to the right against a friction force of 10 net.what is the net force.in what direction
Alenkasestr [34]
Yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
6 0
3 years ago
When a car drives over a speed bump and oscillates up and down in simple harmonic motion, at which position during the motion is
Oksana_A [137]
Using the second Law of Newton, F = m * a, you know that acceleration is maximum when the force is maximum.


Using Hooke's Law, F = K Δx, you know that the force is maximum when the displacement from the equilibrium (Δx) is maximum.


So the answer is that the acceleration is maximum at the maximum amplitude x = a.
3 0
3 years ago
PROVE YOUR INTELLIGNCE HERE!!!! (IMAGE ATTATCHED FOR YOUR CONVENIENCE)
gregori [183]

Answer:

There's an image... 〒▽〒 where?

Explanation:

8 0
3 years ago
Whats the origin of all stars?<br> a) supernova<br> b) dwarfs<br> c) protostars<br> d) nebulae
Fudgin [204]
All stars originated from c., protostars. Protostars are the earliest phase of the process of star evolution.

-Starry Sky 

Oh lmao, my name and the irony. cx
5 0
3 years ago
Read 2 more answers
An electron accelerates through a 12.5 V potential difference, starting from rest, and then collides with a hydrogen atom, excit
Yanka [14]

Answer:

Initial state    Final state

     3           ⇒        2

     3           ⇒        1

     2          ⇒         1

Explanation:

For this exercise we must use Bohr's atomic model

         E = - 13.606 / n²

where is the value of 13.606 eV is the energy of the ground state and n is the integer.

The energy acquired by the electron in units of electron volt (eV)

          E = e V

          E = 12.5 eV

all this energy is used to transfer an electron from the ground state to an excited state

        ΔE = 13.6060 (1 / n₀² - 1 / n²)

the ground state has n₀ = 1

       ΔE = 13.606 (1 -  1/n²)

        1 /n² = 1 - ΔE/13,606

         1 / n² = 1 - 12.5 / 13.606

         1 / n² = 0.08129

          n = √(1 / 0.08129)

          n = 3.5

 since n is an integer, maximun is

         n = 3

because it cannot give more energy than the electron has

From this level there can be transition to reach the base state.

 

Initial state    Final state

     3           ⇒        2

     3           ⇒        1

     2          ⇒         1

8 0
3 years ago
Other questions:
  • To calculate how much rest energy an object contains, you multiply
    11·1 answer
  • In a physics lab, light with wavelength 490 nm travels in air from a laser to a photocell in 17.0 ns. When a slab of glass 0.840
    7·1 answer
  • A wave that can travel through empty space and<br> through matter
    6·1 answer
  • Engineers want to design seats in commercial aircraft so that they are wide enough to fit 95​% of all males.​ (Accommodating 100
    15·1 answer
  • The wavelength of some violet light is 420.0 nm. what is the frequency of this violet light?
    10·2 answers
  • Suppose that instead of dropping the rock you throw it downwards so that its speed after falling 7 meters is 23.43 m/s. How much
    9·2 answers
  • A yo-yo is twirled on a 4 meter long string so that its tangential
    9·1 answer
  • Momentum is mass times velocity, so another way to think of momentum is ____ in motion.
    12·1 answer
  • If a species experiences a helpful mutation, like camouflage, explain how that mutation would help the species to better survive
    15·1 answer
  • Someone pushes on a rock and measures the net force acting on it is 147 N and acceleration to be 7.5m/s2.What is the weight of t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!