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
Zigmanuir [339]
3 years ago
6

The three small spheres are welded to the light rigid frame which is rotating in a horizontal plane about a vertical axis throug

h O with an angular velocity w= 20 rad/s. If a couple MO= 30 N.m is applied to the frame for 5 seconds, compute the new angular velocity.
Physics
1 answer:
Nutka1998 [239]3 years ago
8 0

Answer:

The new angular velocity will be "80.73 rad/sec".

Explanation:

The given values are:

Angular velocity, W = 20 rad/s

M = 30 N

Time, t = 5 seconds

As we know,

Wf=Wi+\frac{Mt}{I}

On putting the values in the above formula, we get

Wf=20+\frac{30\times 5}{m1L1^2+m2L2^2+m3L3^2}

Wf=20+\frac{150}{m1L1^2+m2L2^2+m3L3^2}

Wf=80.73 \ rad/sec

You might be interested in
a ball is thrown inclined in to the air with a initial velocity of u. if it reaches the maximum height in 6 seconds , find the r
olga55 [171]

Answer:

11:1

Explanation:

At constant acceleration, an object's position is:

y = y₀ + v₀ t + ½ at²

Given y₀ = 0, v₀ = u, and a = -g:

y = u t − ½g t²

After 6 seconds, the ball reaches the maximum height (v = 0).

v = at + v₀

0 = (-g)(6) + u

u = 6g

Substituting:

y = 6g t − ½g t²

The displacement between t=0 and t=1 is:

Δy = [ 6g (1) − ½g (1)² ] − [ 6g (0) − ½g (0)² ]

Δy = 6g − ½g

Δy = 5½g

The displacement between t=6 and t=7 is:

Δy = [ 6g (7) − ½g (7)² ] − [ 6g (6) − ½g (6)² ]

Δy = (42g − 24½g) − (36g − 18g)

Δy = 17½g − 18g

Δy = -½g

So the ratio of the distances traveled is:

(5½g) / (½g)

11 / 1

The ratio is 11:1.

8 0
4 years ago
What is the current through a 25 ohm resistor connected to a 5.0 V power supply? a 0.20 A b 5.0 A c 25 A d 30 A
zysi [14]
~Formula: Voltage= current• resistance
(V= Ir)
~Using this formula, plug in the numbers from the equation into the formula
~5=25i
~Now you have a one-step equation
~Divide by 25 on both sides and you should get your answer:
~I= 0.2 (which means current is 0.2)
8 0
3 years ago
as your roller coaster climbs to the top of the steepest hill on its track when does the first car have the greatest potential e
pochemuha
...the potential energy that you build while going up the hill on the roller coaster could be let go as kinetic energy -- the energy of motion that takes you down the hill of the roller coaster.
4 0
4 years ago
A car with a momentum of 3,200 kg-m/s moves foward at a rate of 2 m/s. What is the mass of the vehicle?
natulia [17]

Answer:

1600 kg

Explanation:

use the formula p=mv. p=3200, v=2. Plug in and rearrange.

3200=(m)(2)

m= 3200/2

m=1600

5 0
3 years ago
A bottle dropped from a balloon reaches the ground in 20 s. determine the height of the balloon if (a) it was at rest in the air
romanna [79]
<span>a) 1960 m b) 960 m Assumptions. 1. Ignore air resistance. 2. Gravity is 9.80 m/s^2 For the situation where the balloon was stationary, the equation for the distance the bottle fell is d = 1/2 AT^2 d = 1/2 9.80 m/s^2 (20s)^2 d = 4.9 m/s^2 * 400 s^2 d = 4.9 * 400 m d = 1960 m For situation b, the equation is quite similar except we need to account for the initial velocity of the bottle. We can either assume that the acceleration for gravity is negative, or that the initial velocity is negative. We just need to make certain that the two effects (falling due to acceleration from gravity) and (climbing due to initial acceleration) counteract each other. So the formula becomes d = 1/2 9.80 m/s^2 (20s)^2 - 50 m/s * T d = 1/2 9.80 m/s^2 (20s)^2 - 50m/s *20s d = 4.9 m/s^2 * 400 s^2 - 1000 m d = 4.9 * 400 m - 1000 m d = 1960 m - 1000 m d = 960 m</span>
6 0
4 years ago
Other questions:
  • Tala wants to create a sound echo. She can create the echo using a pane of glass or a carpet square. Which one does she choose?
    14·1 answer
  • What are three common forms of work in science
    6·2 answers
  • Light rays in a material with index of refraction 1.31 can undergo total internal reflection when they strike the interface with
    9·1 answer
  • If aluminum loses all 3 electrons how do you write the ion
    12·1 answer
  • 3.
    8·2 answers
  • a person Travels along a straight road for half the distance with velocity V1 and the remaining half the distance with velocity
    7·1 answer
  • When you irradiate a metal with light of wavelength 433 nm in an investigation of the photoelectric effect, you discover that a
    10·1 answer
  • If a 50 N force was applied to a really massive object as well as a tiny object, what can you say
    11·1 answer
  • A man whose mass is 69 kg and a woman whose mass is 52 kg sit at opposite ends of a canoe 5 m long, whose mass is 20 kg. Suppose
    15·1 answer
  • what type of simple machine is shown in the diagram?write the length and height of slope in it. Please help ASAP!!!​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!