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
iragen [17]
3 years ago
8

A 30-kg child starts at the center of a playground merry-go-round that has a radius of 2.1 m and rotational inertia of 500 kg⋅m2

and walks out to the edge. The merry-go-round has a rotational speed of 0.20 s−1 when she is at the center?
Physics
1 answer:
Sever21 [200]3 years ago
8 0

Answer:

\omega = 0.16 s^{-1}

Explanation:

As we know that there is no torque on the system of merry go round

so the angular momentum will remain conserved

so here we have

I_1\omega_0 = (I_1 + I_2)\omega

so we will have

I_1 = 500 kg m^2

I_2 = 30(2.1^2)

I_2 = 132.3 kg m^2

\omega_0 = 0.20 s^{-1}

now from above formula

500(0.20) = (500 + 132.3)\omega

\omega = 0.16 s^{-1}

You might be interested in
1. thomas jefferson proposed using the length (l) of a simple pendulum whose period (t) was exactly 2 seconds as the definition
Alecsey [184]

The length of a 2 sec pendulum is 1 m.

Given that, initial length of the simple pendulum L₁ = 1 m

Initial time period T₁ = 2 sec

We need to find the length of the pendulum whose time period is 2 sec

T₂ = 2 sec

L₂ = ?

We know that the time period of the simple pendulum is given by the formula,

T = 2π√(L/g)

From the above relation, we can write T ∝ √L

T₁ / T₂ = √(L₁/L₂)

Making L₂ from the above relation, we have,

L₂ = (T₂² * L₁)/ T₁² = 2² * 1/ 2² = 1 m

Thus, the length of a 2 sec pendulum is 1 m.

To know more about time period:

brainly.com/question/17350379

#SPJ4

7 0
1 year ago
Not everything in science is clear-cut, with obvious problems, experiments, theories, and solutions. Sometimes scientists gather
sergij07 [2.7K]
A. science sometimes requires creativity
4 0
3 years ago
Which of the following is a problem that some people blame on technology?
seropon [69]
The correct answer is B, widespread pollution. If you look closely, you can see that the other answers are not problems at all, but benefits! :)
7 0
3 years ago
Read 2 more answers
i will give brainliest Which of the following structures are present in plant cells but absent in animal cells? Choose 1 answer:
Sonja [21]

Answer:

A. cell walls

Explanation:

Plants have cell walls but animals dont.

3 0
3 years ago
If an organism didn't have DNA, it would be missing which sign of life ? a, b , c
sergey [27]

Answer:

A

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Lizette works in her school’s vegetable garden. Every Tuesday, she pulls weeds for 15 minutes. Weeding seems like a never-ending
    15·2 answers
  • A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the
    8·1 answer
  • Scouts at a camp shake the rope bridge they have just crossed and observe the wave crests to be 9.70 m apart. If they shake the
    9·1 answer
  • A person trapped outside during a thunderstorm should
    7·2 answers
  • Porque al tomar agua y la dejo en mi boca no se baja? Curiosidad xd
    14·1 answer
  • QUESTION 2 DOK 3 A Thompson's gazelle has a maximum acceleration of 4.5 m/s2 At this acceleration, how much time is required for
    10·1 answer
  • 125 cm of gas are collected at 15 °C and
    9·1 answer
  • A wheel rotating with a constant angular acceleration turns through 19 revolutions during a 3 s time interval. Its angular veloc
    6·1 answer
  • What is the density of a block of wood with a mass of 12g and a volume of 6 cm3?
    11·1 answer
  • Which of the following is true?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!