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
jekas [21]
3 years ago
15

A gymnast weighs 450 N. She stands on a balance beam of uniform construction which weighs 250 N. The balance beam is 3.0 m long

and is supported at each end. If the support force at the right end is four times the force at the left end, how far from the right end is the gymnast
Physics
1 answer:
Damm [24]3 years ago
7 0

Answer:

   x = 9.32 cm

Explanation:

For this exercise we have an applied torque and the bar is in equilibrium, which is why we use the endowment equilibrium equation

Suppose the counterclockwise turn is positive, let's set our reference frame at the left end of the bar

          - W l / 2 - W_{child} x + N₂ l = 0

             x = \frac{-W l/2 + n_2 l}{W_{child}}             1)

now let's use the expression for translational equilibrium

         N₁ - W - W_(child) + N₂ = 0

indicate that N₂ = 4 N₁

we substitute

           N₁ - W - W_child + 4 N₁ = 0

           5 N₁ -W - W_{child} = 0

           N₁ = ( W + W_{child}) / 5

         

we calculate

           N₁ = (450 + 250) / 5

          N₁ = 140 N

           

we calculate with equation 1

           x = -250 1.50 + 4 140 3) / 140

           x = 9.32 cm

You might be interested in
Is magnesium a metal ?
tatuchka [14]
Yes Magnesium Its Metal 
8 0
3 years ago
Rank the vector combinations on the basis of their magnitude.
melomori [17]

I think this is about the 5th or 6th time I've seen this question
submitted to Brainly.  So far, nobody has yet given us any of
the rest of the question ... the part that tells us something about
the vectors, so that we have some way to know their magnitudes.
So far, nada.

6 0
3 years ago
2 Points<br> What type of image is formed by a lens if m= -0.87?
aksik [14]

Answer:

Virtual image

Explanation:

Virtual image is formed whenever the rays of an object diverges

4 0
3 years ago
Que actitud Tomárias si te sientes marginado​
tresset_1 [31]
Buscar nuevos amigos, si no te quieren contigo o te ponen de lado, en realidad no son tus amigos o compañeros, nadie se merece eso, no necesitas esas personas en tu vida.
7 0
3 years ago
What are the factors affecting gravitational force?​
oee [108]
  • Answer:
  • Distance between objects
  • Mass of objects
  • Force of gravitational field

6 0
4 years ago
Other questions:
  • A bucket weighing 5 lbs is lifted at a constant rate from the bottom of a 100 ft well by a rope which weighs 5 lbs. The bucket h
    15·1 answer
  • Describe the dynamic equilibrium that exists between the two water tanks at right.
    15·1 answer
  • Suppose that a 117.5 kg football player running at 6.5 m/s catches a 0.43 kg ball moving at a speed of 26.5 m/s with his feet of
    15·1 answer
  • to lift a load to roof, you apply 21 n of force to a pulley. the pulley applies 21 n of force to the load. what is the mechanica
    5·1 answer
  • In most compartment fires, the energy release in fire is directly proportional to the:
    14·1 answer
  • In the United States, which type of industry is often considered part of an oligopoly?
    15·2 answers
  • What is the kinetic energy of a bike with a mass of 16 kg traveling at 4m/s
    8·1 answer
  • A plane flies at 400 north of East for 150 miles,then flies 200 miles at an angle of 150 west of North. What is the plane's fina
    5·1 answer
  • A small object of mass M is shot horizontally from a spring launcher that is attached to a table. All frictional forces are cons
    13·1 answer
  • Justina dreamed last night that she was warding off villains in a life or death battle outside a fortified castle. In the dream,
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!