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
LenKa [72]
3 years ago
11

Three identical 50-kg masses are held at the corners of an equilateral triangle, 30 cm on each side. If one of the masses is rel

eased, what is its initial acceleration, if the only forces acting on it are the gravitational forces due to the other two masses?
A)1.9 x 10-8 m/s^2
B)6.4 x 10-8 m/s^2
C)4.2 x 10-8 m/s^2
D)2.5 x 10-8 m/s^2
E)3.7 x 10-8 m/s^2
Physics
1 answer:
kolbaska11 [484]3 years ago
6 0

Answer:

a = 3.21 10⁻⁸ m / s² ,  The correct answer is E

Explanation:

For this exercise we will use Newton's second law, where the force is the gravitational attraction force, the attached diagram shows the forces and their components in a horizontal and vertical coordinate system, due to the symmetry of the equilateral triangle the horizontal components be annulled and the two vertical components add up; let's write Newton's education for the vertical axis (Y)

        2 F_{y} = m a

Let's use trigonometry to find the components

       sin 60 = F_{y}  / F

       F_{y}  = F sin60

     

      2 F sin60 = m a

The gravitational force equation is

     F = G m M / r

The mass of the entire sphere is equal to m = M and the distance between    the spheres is the side of the equilateral triangle

    F = G m² / L²

We replace

     2 (G m² / L²) sin60 = m a

     a = 2 G m / L² sin 60

Let's calculate

      a = 6.67 10⁻¹¹  50 / 0.30²  sin 60

      a = 3.21 10⁻⁸ m / s²

The correct answer is E

You might be interested in
Pleae answer asap brcianset
marshall27 [118]

Answer:

>

Explanation:

1/8 is greater than 3/20

5 0
3 years ago
In two or more complete sentences, explain how you can prove that the number of degrees that the Moon rotates around the Earth e
PolarNik [594]

Answer:

Follows are the explanation to this question:

Explanation:

In this solution, it is defined that there are two principal motions for the moon, which are its revolution as well as rotation. In such a movement called revolution, its Moon is relocating around the Earth, in which the approximate movement of the moon from around earth has an average movement of about 13.2° per day, or 92 degrees every week, that's once in 27.3 days.

3 0
3 years ago
Read 2 more answers
Find the separation of two points on the Moon’s surface that can just be resolved by the 200 in. (= 5.1 m) telescope at Mount Pa
rewona [7]

Answer:

The separation of the 2 points should be 50.0 meters.

Explanation:

According to Rayleigh's scattering criteria the angular separation between 2 points to be resolved equals

\theta =1.22\cdot \frac{\lambda }{D}

Applying the given values we get

\theta =1.22\cdot \frac{550\times 10^{-9} }{5.1}=0.1316\times 10^{-6}rads

thus the linear separation equals L=\theta \times Distance

Applying the given values we get

L=0.1316\times 10^{-6} \times 3.8\times 10^{5}\times 10^{3}meters\\\\\therefore L=50.00metes

6 0
3 years ago
In a car engine, what type of energy is released at a high level, leading to inefficiency?
spin [16.1K]
Thermal energy is the answer
7 0
3 years ago
Please help me! It states constant speed but moving in circular motion. I know there is acceleration due to a rate of change of
Morgarella [4.7K]
Direction of resultant force in circular motion is directed towards the center of the circle. Hence vector B is the direction of the resultant force.
8 0
3 years ago
Other questions:
  • What role does density play in the movement of convection curruents?
    5·1 answer
  • A ball is thrown straight upward and returns to the thrower’s hand after 1.8 s in the air. A second ball is thrown at an angle o
    7·1 answer
  • Which statement best describes what energy transfer diagrams show? Energy can change form, but the total amount of energy stays
    12·2 answers
  • Which of the following is the most likely end for a star that is small to average in size? A. blue main sequence B. red supergia
    5·2 answers
  • Which of the following statements is FALSE?
    13·1 answer
  • A young athlete has a mass of 42 kg. On a day when there is no wind she runs a 100m race in 14.2
    7·1 answer
  • What is in the center of our galaxy?
    5·2 answers
  • An impulse of 12.2kg m/s is delivered to an object whose initial momentum is 4.5kgm/s. What is the object's final momentum?
    12·1 answer
  • Bromine vapour is heavier than air. even so it's spreads upwards in the experiment above. Why?
    15·1 answer
  • I need help 8th grade science test review will give brainest
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!