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
slega [8]
3 years ago
13

An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular decelerat

ion of magnitude 2.23 rad/s 2 . Through how many revolutions does the wheel turn before it finally comes to rest
Physics
1 answer:
tamaranim1 [39]3 years ago
8 0

Answer:

Explanation:

Initial angular velocity ω₀ = 151 x 2π / 60

= 15.8  rad /s

final velocity = 0

Angular deceleration α = 2.23 rad / s

ω² = ω₀² -  2 α θ

0 = 15.8² - 2 x 2.23 θ

= 55.99  rad

one revolution = 2π radian

55.99 radian = 55.99  / 2 π no of terns

= 9 approx .

You might be interested in
Lowest frequency?_______​
Sergio039 [100]

Answer:

Radio waves are the lowest frequency

Explanation:

Here is the order of frequencies highest to lowest to help you in the future:

gamma rays

X-rays

ultraviolet radiation

visible light

infrared radiation

radio waves

8 0
3 years ago
Hii please help i’ll give brainliest if you give a correct answer please please hurry it’s timed
Zina [86]

Answer: The answer is A for sure

Explanation:

That is, there will be no acceleration. If you are sitting at rest in a chair and the upward push of the chair is equal to the downward pull of gravity, you will stay at rest in the chair. ... You now have an unbalanced force acting on you and therefore, according to Newton's First Law, your motion is going to change.

Plz give brainlest :)

3 0
3 years ago
A 30-mm-diameter copper rod is 1 m long with a yield strength of 70 MPa. Determine the axial force necessary to cause the diamet
ivolga24 [154]

Explanation:

Given data:

d = 30 mm = 0.03 m

L = 1m

S_{y} = 70 Mpa

Δd = -0.0001d

Axial force = ?

validity of elastic deformation assumption.

Solution:

O'₂ = Δd/d = (-0.0001d)/d = -0.0001

For copper,

v = 0.326      E = 119×10³ Mpa

O'₁ = O'₂/v = (-0.0001)/0.326 = 306×10⁶

∵δ = F.L/E.A    and σ = F/A so,

σ = δ.E/L = O'₁ .E = (306×10⁻⁶).(119×10³) = 36.5 MPa

F = σ . A = (36.5 × 10⁻⁶) . (π/4 × (0.03)²) = 25800 KN

S_{y} = 70 MPa > σ = 36.5 MPa

∵ elastic deformation assumption is valid.

so the answer is

F = 25800 K N            and     S_{y} > σ

3 0
3 years ago
Three light bulbs are connected to a battery in a series circuit. How will the bulbs behave if the circuit is closed?
stiv31 [10]

all three will glow A

6 0
3 years ago
Read 2 more answers
calculate the work done by a girl of mass 40 kg when she climbs a stair case of 20 steps each of height 10 cm and acceleration i
Volgvan

Answer:

i think its a 800x² hope you like it

5 0
3 years ago
Read 2 more answers
Other questions:
  • Three equal point charges, each with charge 2.00 μC , are placed at the vertices of an equilateral triangle whose sides are of l
    5·1 answer
  • Diffraction occurs when waves _____ after passing through an opening
    11·2 answers
  • Help please suffering
    5·1 answer
  • The velocity of the transverse waves produced by an earthquake is 5.08 km/s, while that of the longitudinal waves is 8.3312 km/s
    6·1 answer
  • After how many seconds does the motorcycle have positive acceleratolion​
    12·1 answer
  • you push a box across the floor with a force of 30n you it 15 meters in 8 seconds. how much work did you do how much power did y
    5·2 answers
  • The ramp on the back of a moving van is in example of what type <br> simple machine
    5·2 answers
  • What are alkaline earth metals used for?
    13·2 answers
  • What is an example of a form of friction that impedes motion
    13·1 answer
  • An arrow is shot into a falling apple. What type of collision is this an example of?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!