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
Ghella [55]
3 years ago
12

A 41.0-kg child swings in a swing supported by two chains, each 3.04 m long. The tension in each chain at the lowest point is 35

8 N. (a) Find the child's speed at the lowest point. m/s (b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.) N (upward)
Physics
1 answer:
Fantom [35]3 years ago
8 0

Answer:

V = 4.826m/s, 716N

Explanation:

At the lowest swinging point, the net force acting on the child is equal to the centripetal force and it could be represented as

F = mv^2/r

2T-mg =mv^2/r

r(2T-mg) = mv^2

Divide both sides by m

r(2T-mg)/m = mv^2/m

r(2T/m-g) = v^2

V= √ r(2T/m-g)

Where v is the velocity

r is the length of the chain

m is the mass of the child in kg

T is the tension in Newton

g is the acceleration due to gravity

Given that g = 9.8m/s^2

T = 358N

m = 41.0kg

r = 3.04m

Substituting the values into the formula

V = √ 3.04( 2*358/41 -9.89

V = √ 3.04 ( 716/41 - 9.8 )

V = √3.04 ( 17.463-9.8 )

V = √3.04( 7.6634)

V = √23.2967

V = 4.826m/s

For the second part which is the tension in the two chains

N - m*g = m*(v^2 / r)

N - (41)*(9.81) = (41)*(4.826^2 / 3.04)

N - 402.21 = 41×7.66

N - 402.21 = 314.112

N = 402.21 + 314.112

N = 716.332 newton

Approximately = 716N

Or alternatively, since there are two chains holding the swing, of which each chain is acted upon by a 358N tension. Hence = 2T

2*358 = 716N

You might be interested in
A square sheet of rubber has sides that are 20 cm long. What is the area of the square of rubber in cm squared?
Alinara [238K]

Answer:

400cm^2

Explanation:

sides are 20cm long Area for a square is a squared

since all the lides are of equal length you can just choose one side.

20squared is 400

20 x 20 = 400cm squared

Hope this helps :)

6 0
3 years ago
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (60pts)
mr Goodwill [35]
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
So since the boat has a lower density than the water, it will float.
So the answer is choice B
3 0
3 years ago
Quel est le type de rayonnement produit par la radioactivité
Dmitriy789 [7]

Il existe troi types de rayons produits lors de la désintégration des éléments radioactifs:

-- "particules alpha" . . . noyaux d'hélium, composés chacun de 2 protons et 2 neutrons

-- "rayons bêta" ou "particules bêta" . . . flux d'électrons

-- "rayons gamma" . . . rayonnement électromagnétique avec les longueurs d'onde les plus courtes connues et l'énergie la plus élevée

8 0
3 years ago
t is the estimated distance traveled through the air by a marshmallow that is launched from a 15- cm long launcher when it is pl
DerKrebs [107]

Answer:

10

Explanation:

15 cm minus 5 cm

5 0
3 years ago
What is power?
Blizzard [7]

Answer:

D

Explanation:

P=Work/Time

The rate at which work is done matches that.

6 0
3 years ago
Other questions:
  • While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the
    6·2 answers
  • How do you read a topographic map?
    9·2 answers
  • A 5.45-g combustible sample is burned in a calorimeter. the heat generated changes the temperature of 555 g of water from 20.5°c
    5·1 answer
  • What is the peak emf generated (in V) by rotating a 1000 turn, 42.0 cm diameter coil in the Earth's 5.00 ✕ 10−5 T magnetic field
    5·1 answer
  • Read the scenario.
    11·2 answers
  • Define force in your own words.
    12·2 answers
  • How is momentum conserved in a system in which two satellites connect?
    11·2 answers
  • A group of college students eager to get to Florida on a spring break drove the 710-mi trip with only minimum stops. They comput
    15·1 answer
  • An acceleration of 2m/s^2 is produced on a body by applying an effort of 50N. calculate mass of the body​
    10·2 answers
  • Es muy común que cuando se viaja hacia un río o lago se juegue “ranita”, el cual consiste en lanzar una piedra horizontalmente h
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!