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
Valentin [98]
4 years ago
8

A person carries a plank of wood 2.00 m long with one hand pushing down on it at one end with a force f1 and the other hand hold

ing it up at .500 m from the end of the plank with force f2 . if the plank has a mass of 20.0 kg and its center of gravity is at the middle of the plank, what are the magnitudes of the forces f1 and f2 ?
Physics
1 answer:
slega [8]4 years ago
4 0

Answer:


F₁ = 4,120.2 N


F₂ = 3,924N


Explanation:



1) Balance of angular momentum around the end where F₁ is applied.


F₂ × 0.5m - F₁ × 0 = mass × g × 1m


⇒ F2 × 0.5 m= 20 kg × 9.81 m/s² × 1 m = 1,962 N×m


F₂ = 196.2 Nm / 0.5m = 3,924 N


2) Balance of forces


F₁ - F₂ = mg


F₁ = F₂ + mg = 3,924N + 20kg (9.81 m/s²) = 4,120.2 N

You might be interested in
What was significant about the discovery of gallium
Kryger [21]
It confirmed medeleeve's hypothesis (prediction) and showed the use of his table
8 0
3 years ago
Read 2 more answers
A car is traveling north. can its acceleration vector ever Point South? explain​
Scrat [10]
Yes.

The acceleration vector WILL point south when the car is slowing down while traveling north

7 0
3 years ago
A box of mass m is suspended by two ropes from a ceiling. if the ropes make the same angle with the vertical, what is the tensio
lilavasa [31]

The tension, T, in each rope is T= mg/2Sinθ

<h3>What is tension force?</h3>

Tension refers to the pulling force in a string which acts in an opposite direction to the force pulling on it.

The tension in each of the ropes are equal since they both make the same angle with the vertical.

Assume the angle the ropes make with the vertical are both θ.

Let the tension in each be T₁ and T₂

Also, T₁ = T₂ = T

T₁Sinθ + T₂Sinθ = mg

2TSinθ = mg

T = mg/2Sinθ

Therefore, the tension, T, in each rope is T = mg/2Sinθ

Learn more about tension at: brainly.com/question/14336853

#SPJ4

7 0
1 year ago
WILL GIVE BRAINLIEST
max2010maxim [7]
D, the plant takes Solar/Light energy and converts it into chemical energy.
5 0
4 years ago
Read 2 more answers
What type of blood vessel returns blood to the heart?
djyliett [7]
The superior and inferior vena cava are collectively called the venae cavae. The venae cavae, along with the aorta, are the great vessels involved in systemic circulation. These veins return deoxygenated blood from the body into the heart, emptying it into the right atrium.
5 0
3 years ago
Other questions:
  • When the flower below is rotated clockwise 90°, where will the red petal be in the image?
    13·1 answer
  • How much energy in calories does it take to melt 10 grams of ice?
    5·2 answers
  • Match each action to its result. The strength of the electromagnet increases. The electromagnet turns off. The poles of the elec
    8·1 answer
  • A certain x-ray tube requires a current of 7 mA at a voltage of 80 kV. The rate of energy dissipation is:
    15·1 answer
  • A horse pulls a cart along a flat road. Consider the following four forces that arise in this situation. (1) the force of the ho
    8·1 answer
  • a disk initially at rest rotates with constant angular acceleration through an angel of 50 rad in 5 sec find the angular speed o
    14·1 answer
  • Determine the amount of work you would need to do in order to stop a 1100kg car with 1400J of kinetic energy.
    9·1 answer
  • The Mandalorian tells baby Yoda (Grogu) to put on his seatbelt in his ship the Razor Crest. Explain why is it a good idea to hav
    7·2 answers
  • A new planet has been discovered and given the name Planet X . The mass of Planet X is estimated to be one-half that of Earth, a
    11·1 answer
  • Two balls of equal mass collide and stick together as shown in the figure. The initial velocity of ball B is twice that of ball
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!