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
schepotkina [342]
3 years ago
6

Abridgeis36.5mlongandweighs2.56x105N.Atruckweighing 5.25x104Nis10.2 m from one end of the bridge. Calculate the upward force tha

t must be exerted by each pier to support thisweight
Physics
1 answer:
enot [183]3 years ago
3 0

Answer:

Explanation:

Bridge length A B = 36.5 m

weight W = 2.56 x 10⁵ N acting at middle point that is at 18.25 m from either end.

weight of truck W₁ = 5.25 x 10⁴ N  standing at 10.2 m from A .

Let force at A be F₁ and at B be F₂ .

Balancing total upward and downward force

F₁ + F₂ = ( 2.56 + .525 ) x 10⁵ = 3.085 x 10⁵ N

Taking torque of all the forces , for rotational balancing

2.56 x 10⁵ x 18.25 + .525 x 10⁵ x 10.2 = F₂ x 36.5

(46.72 + 5.355 )x 10⁵ = F₂ x 36.5

F₂ = 1.42 x 10⁵ N

F₁ = 1.665 x 10⁵ N

You might be interested in
Does anyone know the answer to all of these questions
Rasek [7]

Answer:

i don't understand the hw

5 0
3 years ago
A 2 kg rubber ball is thrown at a wall horizontally at 3 m/s, and bounces back the way it came at an equal speed. A 2 kg clay ba
Lyrx [107]

Answer:

THE RUBBER BALL

Explanation:

From the question we are told that

      The mass of the rubber ball is m_r   =  2 \ kg

      The  initial  speed of the rubber ball is  u =  3 \ m/s

      The final speed at which it bounces bank v  - 3 \ m/s

      The mass of the clay ball  is  m_c =  2  \ kg

       The  initial  speed of the clay  ball is u = 3 \ m/s

       The final speed of the clay ball is  v = 0 \  m/s

Generally Impulse is mathematically represented as

       I  =  \Delta p

where \Delta  p is the change in the linear momentum so  

       I  =  m(v-u)

For the rubber  is  

        I_r  =  2(-3 -3)

       I_r  = -12\ kg \cdot  m/s

=>     |I_r|  = 12\ kg \cdot  m/s

For the clay ball

       I_c  =  2(0-3)

        I_c =  -6 \ kg\cdot \ m/s

=>    | I_c| =  6 \ kg\cdot \ m/s

So from the above calculation the ball with the a higher magnitude of impulse is the rubber ball

       

8 0
4 years ago
A swimmer, capable of swimming at a speed of 1.0 m/s in still water (i.e., the swimmer can swim with a speed of 1.0 m/s relative
Vesnalui [34]
If the current takes him downstream we must find the resultant vector of the velocities: V res= \sqrt{1^{2}+0.91^{2}  } = \sqrt{1.8281}= 1.3520747 Then if the river is 3000 m-wide the swimmer will have to pass:
 1.3520747 · 300 = 4056.14 m                t = 4056.14 m : 1 m/s
a ) It takes 4056.15 seconds ( 1 hour 7 minutes and 36 seconds ) to cross the river.  
b ) 0.91 · 3000 = 2730 m
He will be 2730 m downstream.
5 0
3 years ago
The arrows on the diagram show the ocean floor spreading from the Redge what three kinds of evidence scientists have found suppo
Blizzard [7]
Edit: You do mean Ridge?

Rocks near Mid-Ocean Ridge are younger than rocks near the trenches.

Seismic data shows oceanic crust is sinking into the mantle at the trenches.

Matching bands of magnetic rock are found on either side of the Ridge. Earth's magnetic fields change these bands over time.
5 0
3 years ago
Help please hurry! ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️
eimsori [14]
IV - Temperature
DV - Light intensity
8 0
3 years ago
Other questions:
  • A 24-cm-diameter vertical cylinder is sealed at the top by a frictionless 15 kg piston. The piston is 90 cm above the bottom whe
    5·1 answer
  • What does the negative sign in F = –kx mean?
    11·1 answer
  • If you adjust the brightness of a light until it matches the intensity of sourness of the taste of a lemon, you are engaging in
    12·1 answer
  • A square wire, 20 cm on the side, moves at constant speed parallel to the xy-plane into a region where there is a uniform magnet
    6·1 answer
  • I need help!!!!!!!
    5·1 answer
  • A catcher "gives" with a baseball when catching it. If the baseball exerts a force of 437 N on the glove, so that the glove is d
    13·1 answer
  • The displacement of a wave traveling in the positive x-direction is y(x, t)|= (3.5 cm)cos(2.7x − 92t), where x is in m and t is
    13·1 answer
  • How many joules are required to heat .250 kg of liquid water from 0 °C to 100 °C ?
    10·1 answer
  • A typical carbon atom has six protons, six neutrons, and six electrons. Which of these has the least amount of mass?
    14·1 answer
  • A student holds an egg outside of an open window and let's go. The window is 40 meters above the ground and the egg is falling u
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!