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
goldenfox [79]
3 years ago
9

A thin, uniform rod is hinged at its midpoint. to begin with, one-half of the rod is bent upward and is perpendicular to the oth

er half. this bent object is rotating at an angular velocity of 6.9 rad/s about an axis that is perpendicular to the left end of the rod and parallel to the rod's upward half (see the drawing). without the aid of external torques, the rod suddenly assumes its straight shape. what is the angular velocity of the straight rod?
Physics
1 answer:
bazaltina [42]3 years ago
5 0
<span>Answer: initial I = (m/2)L²/3 + (m/2)L² where L = ½ the length of the rod, and the vertical half can be treated as a point mass. initial I = mL²(1/6 + 1/2) = 2mL²/3 final I = m(2L)²/3 = 4mL²/3 Since I has doubled and momentum is conserved, ω has halved. ω = 3.9 rad/s. Formulaically: 2mL²/3 * 7.8rad/s = 4mL²/3 * ω</span>
You might be interested in
A person with mass mp = 76 kg stands on a spinning platform disk with a radius of R = 1.98 m and mass md = 191 kg. The disk is i
nalin [4]
<span>1.7 rad/s The key thing here is conservation of angular momentum. The system as a whole will retain the same angular momentum. The initial velocity is 1.7 rad/s. As the person walks closer to the center of the spinning disk, the speed will increase. But I'm not going to bother calculating by how much. Just remember the speed will increase. And then as the person walks back out to the rim to the same distance that the person originally started, the speed will decrease. But during the entire walk, the total angular momentum remained constant. And since the initial mass distribution matches the final mass distribution, the final angular speed will match the initial angular speed.</span>
3 0
3 years ago
A particle, of mass 6 kg, is in equilibrium on a rough horizontal plane under a force o-f magnitude T N, which acts at an angle
Helga [31]

Answer:

T is less than or equal to 19 N

Explanation:

3 0
3 years ago
A plane traveling 40 m/s drops a box from a height of 186 m. Where does the box strike the ground relative to the point directly
Arte-miy333 [17]

Answer:the horizontal velocity is 40

Explanation:

8 0
3 years ago
On the weather map, what does the symbol shown below represent?
Evgen [1.6K]

Answer:

wind speed i think where i live?

8 0
2 years ago
PLEASE HELP: Why are shooting stars bright?
mrs_skeptik [129]

the answer is c I hope this helps

4 0
3 years ago
Other questions:
  • The _______ is responsible for determining the frequency of vibration of the air column in the tube within a wind instrument. A.
    6·1 answer
  • the line on the position time graph show the velocites of different vehicles which line represents a vehicle moving at constant
    12·1 answer
  • Define Newton’s three laws of motion and how they apply to everyday situations.
    12·1 answer
  • A glass of water sits on a scale. The scale reads 4.78 N. A steel bolt weighs 2.07 N. The density of steel is 7.86 g/cm3. We tie
    14·1 answer
  • imagine you are working as a rollercoaster designer. you are building a ride the top speed of a 65m/s at the bottom of the first
    14·1 answer
  • Write a paragraph of no less than five sentences explaining how Newton's First Law of Motion supports people's need to wear seat
    12·1 answer
  • William Tell shoots an apple from his son's head. The speed of the 105-g arrow just before it strikes the apple is 24.3 m/s, and
    15·1 answer
  • True or false elliptical galaxies are made up of old stars containing small amount of gas
    13·1 answer
  • A bullet is fired vertically upward a velocity of 80m/s to what height will the bullet rise above the point of projection​
    6·1 answer
  • Helppppp!!!!!! inportant need help with b​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!