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
alexira [117]
3 years ago
9

A 129-kg horizontal platform is a uniform disk of radius 1.51 m and can rotate about the vertical axis through its center. A 67.

5-kg person stands on the platform at a distance of 1.09 m from the center and a 25.3-kg dog sits on the platform near the person, 1.37 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
Physics
1 answer:
blondinia [14]3 years ago
3 0

Answer:

I = 274.75 kg-m²

Explanation:

given,

mass of horizontal platform = 129 Kg

radius of the disk = 1.51 m

mass of the person(m_p) = 67.5 Kg

standing at distance(r_p) = 1.09 m

mass of dog(m_d) = 25.3 Kg

sitting near the person(r_d) = 1.37 m from center

moment of inertia = ?

Moment of inertia of disc = \dfrac{1}{2}MR^2

Moment of inertia of the system

I = MOI\ of\ disk + m_p r_p^2 + m_d r_d^2

I = \dfrac{1}{2}MR^2 + m_p r_p^2 + m_d r_d^2

I = \dfrac{1}{2}\times 129 \times 1.51^2 + 67.5 \times 1.09^2 + 25.3\times 1.37^2

I = 274.75 kg-m²

You might be interested in
A neutral atom contains 8 protons 9 neutrons, and 8 electrons the atom must be A. A oxygen isotope. B. A nitrogen isotope. C. A
Harrizon [31]

Answer:

A an Oxygen isotope

Explanation:

The number of protons is the Same as the atomic number

The atomic number is 9 is the atom has 9 protons

Thus, the atom is an oxygen isotope

6 0
3 years ago
Read 2 more answers
The California sea lion is capable of making extremely fast, tight turns while swimming underwater. In one study, scientists obs
anygoal [31]

Answer:

Acceleration of Sea Lion is 4.41 g

This is 49% of maximum jet acceleration given as a = 9g

Explanation:

As we know that the radius of the circular loop is given as

R = 0.37 m

The speed of the fish is given as

v = 4 m/s

Now the centripetal acceleration of the sea lion is given as

a_c = \frac{v^2}{R}

a_c = \frac{4^2}{0.37}

a_c = 43.2 m/s^2

as we know that

g = 9.8 m/s^2

so we have

a = 4.41 g

Now Percentage of this acceleration wrt maximum jet acceleration is given as

P = \frac{4.41 g}{9g} \times 100

P = 49%

6 0
3 years ago
Which compound is most likely a covalent compound?<br> Melting Boiling
mote1985 [20]

Answer:

compound A

Explanation:

because covalent compounds can't conduct electricity and because they also have low boiling points

7 0
3 years ago
How are neutron starts formed ?
Hitman42 [59]

Neutron stars are formed when a massive star runs out of gas and collapses.

8 0
3 years ago
Diffusion occurs faster in gases than in liquids because _____.
jolli1 [7]
The correct answer to go in the blank would be A) The particles are moving faster.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Kepler modified Copernicus's model of the universe by proposing that the A. Planets follow a circular orbit around the sun. B. P
    7·2 answers
  • How far will a runner travel at an average speed of 5m/s for 20 minutes?
    11·1 answer
  • Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from pla
    8·2 answers
  • Why is a hollow pipe stronger than a solid pipe?
    6·1 answer
  • The hill is covered in gravel so that the truck's wheels will slide up the hill instead of rolling up the hill. The coefficient
    14·1 answer
  • The universal law of gravitation states that the force of attraction between two objects depends on which quantities?
    6·1 answer
  • A 1.5m wire carries a 6 A current when a potential difference of 61 V is applied. What is the resistance of the wire?
    8·1 answer
  • The the figure shows a famous roller coaster ride. You can ignore friction. If the roller coaster leaves Point Q from rest, what
    12·1 answer
  • What is the potential energy of a 20-kg safe sitting on a shelf 0.5 meters
    10·1 answer
  • With what force will a car hit a tree if the car has a mass of 3,550 kg and it is accelerating at a rate of 2.5 m/s2 on a snowy
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!