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
kondaur [170]
3 years ago
5

A 30 kg child sitting 5.0 m from the center of a merry-go-round has a constant speed of 5.0 m/s. while she remains seated in the

same spot and travels in a circle, the work the seat performs on her in one complete rotation is
Physics
1 answer:
expeople1 [14]3 years ago
8 0

Let us say that v is the tangential velocity of the object, a to be the centripetal (which acts towards the center of the circle) acceleration and F as the centripetal force, r to be the radius of the circle and m is mass of the child. <span>

a = v^2 / r 

F = ma = mv^2/r 

Applying the given values to the equation: 

F=30*(5^2/5) => 30*(25/5) => 30*5 => 150 Newtons</span>

Now work is Force times distance, the distance is simply the circumference of the circle.

d = C = 2 * pi * r = 2 * pi * 5 = 10π m

 

W = F * d = 150 N * 10π m

<span>W = 1500π J = 4712.39 J</span>

You might be interested in
Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that a
Levart [38]
He produced the first orderly arrangement of known elements, he used patterns to predict undiscovered elements
6 0
3 years ago
Read 2 more answers
A train slows down as it pulls into a station. if the train is moving from your left to your right, what are the directions of t
navik [9.2K]

The directions of the vectors for velocity and acceleration are in the opposite directions.

  • The velocity vector is always in the direction of motion of the object. So, the direction of velocity is in the right from our point of view.
  • When there is a positive acceleration in the object the acceleration vector is in the direction of motion of the object. When there is a negative acceleration in the object the acceleration vector is in the opposite direction of motion of the object. So, the direction of velocity is in the left from our point of view.

Velocity vector is the rate of change of position of an object. Acceleration vector is the rate of change of velocity of an object.

Therefore, the directions of the vectors for velocity and acceleration are in the opposite directions.

To know more about velocity and acceleration vectors

brainly.com/question/13492374

#SPJ4

3 0
1 year ago
What type of clouds usually accompany cold fronts?
ASHA 777 [7]

Answer: Cumulus

Explanation: Most large cloud fronts are made up of cumulus clouds, large storm clouds are cumulonimbus clouds.

6 0
3 years ago
Read 2 more answers
Why are strong forces able to hold atomic nuclei together?
Galina-37 [17]
The nucleons(protons and neutrons) are held together by means of this strong force. If this strong never existed, all the nucleus will blow themselves due to strong repulsive force between protons(neutron has no charge).
Thats it!
If I explain beyond, it will surely bounce off your head. Anyways, if you wanna know more bout it, ping me. (:
4 0
3 years ago
The volume of an object is the amount of space it takes up
soldier1979 [14.2K]
Yes it is. Uh huh, uh huh, shore enuff. Mmm hmm. Yeah yeah yeah. Yah Mon ! Indubitably.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which type of transformer is found outside a residential house
    5·1 answer
  • Charging a balloon by rubbing it on wool is an example of
    11·2 answers
  • What is the charge of a newly formed oxygen ion
    13·1 answer
  • What is the momentum of an animal with a mass of 72kg who is moving with a velocity of 2.2 m/s
    13·1 answer
  • HELP QUICK WILL GIVE BRAINLEST!!!!
    8·2 answers
  • A worker pushes horizontally on a large crate with a force of 170 N, and the crate is moved 3.6 m. How much work was done
    15·1 answer
  • Which of the following items is most sensitive to increased acidity in the environment?
    10·2 answers
  • PLS HELP ASAP I NEED THIS BY TONIGHT
    15·1 answer
  • Please I need your help
    9·1 answer
  • A sound wave produced by a clock chime is heard 400 m away 2.0 s later. The sound wave has a frequency of 512 Hz. What is its pe
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!