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
Natali5045456 [20]
3 years ago
12

A painter sets up a uniform plank so that he can paint a high wall. The plank is 2 m long and weighs 400 N. The two supports hol

ding up the plank are placed 0.2 m from either end. Show that the upwards force on each of the planks is 200 N. Draw a sketch.
Physics
1 answer:
Nimfa-mama [501]3 years ago
5 0

The upward force on each supporting plank is 200 N

<u>The given parameters include;</u>

  • weight of the plank, W₁ = 400 N
  • length of the plank, l = 2 m
  • upward force of each supporting plank, = W₂ and W₃

To show that the upward force of each supporting plank is 200 N, make the following sketch.

                 W₂                                                           W₃

                  ↑                                                              ↑                                                              

           -----------------------------------------------------------------------

              0.2m                         ↓                               0.2m

                                              400 N

  • The two supporting planks keeps the 2m plank in equilibrium position.
  • If the plank is in equilibrium position the sum of the upward forces equals sum of the downward force.

W₂  +   W₃ = 400 N

But the distance of each supporting plank from the end is equal, (0.2m).

Then, W₂  =  W₃

2W₂ = 400 N

W₂ = 400N/2

W₂ = 200 N

W₃ = 200 N

Therefore, the upward force on each supporting plank that keeps the plank in equilibrium position is 200 N.

<u>To learn more about equilibrium forces visit:</u> brainly.com/question/12582625

You might be interested in
According to the principle of conservation of momentum, A. the amount of momentum of all the objects in the universe is constant
anygoal [31]

Answer:

D. in a closed system, an object's momentum before a collision will equal its momentum after the collision.

Explanation:

As we know by newton's II law we have

F = \frac{\Delta P}{\Delta t}

so we will have

F = net force on the system

\Delta P = change in momentum

so we can say if the momentum is conserved or the initial momentum of the system will be equal to the final momentum of the system

then we will say that

\Delta P = 0

so net force on the system must be ZERO

so in such type of questions the system must be isolated and there is no external force on it

so correct answer will be

D. in a closed system, an object's momentum before a collision will equal its momentum after the collision.

6 0
3 years ago
Gravity: The force due to gravity is F=mg where g=9.80 m/s². A. Find the force due to gravity on a 41.63-kg object. B. The force
olga_2 [115]
A. F=mg
= 41.63kg x 9.8m/s²
= 407.974
= 408N (3 significant figure)
B. F=mg
632N= y x 9.8m/s²
y= 632 ÷ 9.8
y = 64.48
y= 64.5kg (3 significant figure)
4 0
3 years ago
Which of the substances in the chart has the greatest density?
svlad2 [7]
A.gold is the answer. As it's density is 19.32 grams per cubic centimeter which is lot more than the other substances.
 
4 0
3 years ago
What quantity is scalar
daser333 [38]

A scalar quantity is a measurement of a quantity, like temperature, or mass.

5 0
3 years ago
Read 2 more answers
Students will consider the following items: ice, glass, copper, and aluminium. what happens to each item when hammered? what pro
vladimir2022 [97]

All metals except potassium and sodium, have a property known as malleability. Malleability is the quality of something that can be shaped into something else without breaking. So when aluminium and copper are hammered they will not break. Rather they will change shape and become thin or flat at the area where its hammered.

All Non- metals except diamond are brittle in nature, so when we hammer it , they will break down into pieces. So when ice and glass will be hammered they will shatter into pieces.

4 0
3 years ago
Other questions:
  • An adiabatic expansion refers to the fact that:
    12·1 answer
  • I need help on career prep
    11·1 answer
  • Use your observations of the circuit construction simulation experiment and your course notes to answer the following questions.
    12·2 answers
  • What is the first stage of a thunderstorm?
    10·2 answers
  • During a medical condition screening lung capacity testing is a standard procedure. True of false
    13·1 answer
  • john and kate live in the regions marked on the map. john experiences severe winters, with snowstorms and blizzards. in contrast
    11·1 answer
  • Though atomic physicists have made significant progress at understanding how God created the atom, a there is not yet a complete
    10·1 answer
  • What is the gravitational force of attraction between two asteroids in space, each with a mass of 50,000 kg, separated
    10·1 answer
  • ILL GIVE YOU ANYTHING TO ANSWER THIS!! IM HELPING MY CRUSH AND IDK THE ANSWER TO THIS PLZ HELP!
    14·1 answer
  • If mass is measured in kg and acceleration is measured in m/s^2, what units would force be measured in? This unit is also know a
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!