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
ser-zykov [4K]
3 years ago
13

Suppose you are at the center of a large freely-rotating horizontal turntable in a carnival funhouse. As you crawl toward the ed

ge, the angular momentum of you and the turntable:
a. decreases.
b. increases.
c. remains the same, but the RPMs decrease.
d. decreases in direct proportion to your decrease in RPMs.
e. none of these
Physics
1 answer:
I am Lyosha [343]3 years ago
4 0

Answer:

c. remains the same, but the RPMs decrease.

Explanation:

Because there aren't external torques on the system composed by the person and the turntable it follows that total angular momentum (I) is conserved, that means the total angular momentum is a constant:

\overrightarrow{L}=constant

The total angular momentum is the sum of the individual angular momenta, in our case we should sum the angular momentum of the turntable and the angular momentum of a point mass respect the center of the turntable (the person)

\overrightarrow{L_{turnatble}}+\overrightarrow{L_{person}}=constant (1)

The angular momentum of the turntable is:

\overrightarrow{L_{turnatble}}=I\overrightarrow{\omega} (2)

with I the moment of inertia and ω the angular velocity.

The angular momentum of the person respects the center of the turntable is:

\overrightarrow{L_{person}}=\overrightarrow{r}\times m\overrightarrow{v} (3)

with r the position of the person respects the center of the turntable, m the mass of the person and v the linear velocity

Using the fact v=\omega r:

\overrightarrow{L_{person}}=\overrightarrow{r}\times rm\overrightarrow{\omega}(3)

By (3) and (2) on (1) and working only the magnitudes (it's all that we need for this problem):

I\omega+r^{2}m\omega=constant

\omega(I+r^{2}m)=constant

Because the equality should be maintained, if we increase the distance between the person and the center of the turntable (r), the angular velocity should decrease to maintain the same constant value because I and m are constants, so the RPM's (unit of angular velocity) are going to decrease.

You might be interested in
Why plate tectonics is a scientific theory and not a scientific law.
ser-zykov [4K]

Answer:

We have not drilled to the center of the earth.

Explanation:

7 0
3 years ago
The sun's _____ is the layer that emits visible light.
galben [10]
The Photosphere is the right answer
7 0
3 years ago
The dimensions of the disk of our milky way galaxy are:.
Katen [24]

Answer:

According to studies, the milky way is approximately, "170,000–200,000 light-years (52–61 kpc) in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick."

With that being said, it is safe to say that the dimensions are somewhere around 100,000 by 1,000

6 0
2 years ago
While standing on a balcony a child drops a penny. The penny lands on the ground floor 1.5 s later. How fast was the penny trave
sveticcg [70]

Answer:

14.7 m/s.

Explanation:

From the question given above, the following data were obtained:

Time (t) = 1.5 s

Acceleration due to gravity (g) = 9.8 m/s².

Height = 11.025 m

Final velocity (v) = 0 m/s

Initial velocity (u) =?

We, can obtain the initial velocity of the penny as follow:

H = ½(v + u) t

11.025 = ½ (0 + u) × 1.5

11.025 = ½ × u × 1.5

11.025 = u × 0.75

Divide both side by 0.75

u = 11.025/0.75

u = 14.7 m/s

Therefore, the penny was travelling at 14.7 m/s before hitting the ground.

8 0
3 years ago
If a total force exerted by water in a container with a bottom area of 2 square meters is 450 newtons, what's the water pressure
m_a_m_a [10]

its B 0.225kPa using the formula p=f/A then change the pascals into kpa

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which wave diagram BEST represents a dim red sunset on the right side to the light from an intense ultraviolet bug light on the
    9·2 answers
  • Why do telescopes give modern astronomers an advantage over people in the past
    14·1 answer
  • Answer and I will give you brainiliest
    7·1 answer
  • What must the net force be equal to in order for the forces on an object to be balanced?
    8·1 answer
  • How is sound produced in our throat​
    6·1 answer
  • 8) What kind of circulation carries blood to all organs and systems?
    14·2 answers
  • A spherical shell of mass M and radius R is completely filled with a frictionless fluid, also of mass M. It is released from res
    8·1 answer
  • One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea level everywhere i
    13·1 answer
  • 4. Un móvil lleva una velocidad de 75 m/s, en dicho momento aplica los frenos durante tiempo de 15 segundos hasta detenerse. ¿cu
    9·1 answer
  • A free body diagram can be used to help work out the net force acting on an object. True or, false?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!