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
fredd [130]
3 years ago
10

What is the kinetic energy of a 200 kg satellite as it follows a circular orbit of radius 8x106m around the earth?

Physics
2 answers:
Lerok [7]3 years ago
7 0

Answer:

Kinetic energy of satellite will be 4.98 × 10^9 J.

Explanation:

The velocity V of a satellite orbiting around the earth is given by  

                            V = √(GM/r)    ………. (i)

Where,  

G = gravitational constant = 6.67 × 10^-11 Nm^2/kg^2

M = mass of earth = 5.97 × 10^24 kg

r = radius of orbit = 8 × 10^6 m

By putting values in  equation (i),

                              V = √((6.67 × 10^-11)(5.97 × 10^24)/ 8 × 10^6)    

                              V = 7055.13 m/s

We know that,  

                            Kinetic energy = ½ mV^2

Where,

m = mass of satellite  

so,

                           Kinetic energy = ½ (200)(7055.13)^2

                           Kinetic energy = 4.98 × 10^9 J

motikmotik3 years ago
4 0
Given the equation for the Speed of a Satellite

v = SqRt{Gravitational Constant}{Mass of Earth} divided by the radius given in your problem

we have:


(square root whole term on right side)

v = G Me
———
r


so. (6.67x10^-11)(5.97x10^24)
___________________
(8.0x10^6)


v = 7055 m/s (which is reasonable)


so utilize the Kinetic Energy Formula


KE = 1/2mv^2


KE = 1/2(200)(7055)^2


KE = 4.977x10^9 J


You might be interested in
How many significant figures does 0.00340 have?
True [87]
Greetings!

"<span>How many significant figures does 0.00340 have?"...

A significant figure is:
-A non zero number
-A zero in between non zero numbers
-Trailing zeros to the right of the decimal point

Therefore, this number has three significant figures:
3,4,0

Hope this helps.
-Benjamin</span>
4 0
3 years ago
Read 2 more answers
A policeman is chasing a criminal across a rooftop at 10 m/s. He decides to jump to the next building which is 2 meters across f
valina [46]

Answer:

They will meet at a distance of 7.57 m

Given:

Initial velocity of policeman in the x- direction, u_{x} = 10 m/s

The distance between the buildings, d_{x} = 2.0 m

The building is lower by a height, h = 2.5 m

Solution:

Now,

When the policeman jumps from a height of 2.5 m, then his initial velocity, u was 0.

Thus

From the second eqn of motion, we can write:

h = ut + \frac{1}{2}gt^{2}

h = \frac{1}{2}gt^{2}

2.5 = \frac{1}{2}\times 10\times t^{2}

t = 0.707 s

Now,

When the policeman was chasing across:

d_{x} = u_{x}t + \frac{1}{2}gt^{2}

d_{x} = 10\times 0.707 + \frac{1}{2}\times 10\times 0.5 = 9.57 m

The distance they will meet at:

9.57 - 2.0 = 7.57 m

   

8 0
3 years ago
What is the distance of separation between objects of masses 5.6 x 10 5 kg and 8.8 x 10 6 kg if the force of gravity between the
AlladinOne [14]

Answer:

2.87m

Explanation:

Using the law of gravitation to solve this question

F = GMm/r²

G is the gravitational constant

M and m are the masses

r is the distance between the masses

Substitute the given values

G = 6.67×10^-11 m³/kgs²

M =8.8 x 10^6 kg

m = 5.6 x 10^5 kg

F =440N

400 = 6.67×10^-11×8.8 x 10^6 ×5.6 x 10^5/r²

400r² = 328.698×10

400r² = 3286.98

r² = 3286.98/400

r² = 8.21745

r = √8.21745

r = 2.87m

Hence the distance of separation is 2.87m

7 0
3 years ago
Which three metals are in the third period (row) of the periodic table?
Anettt [7]
Sodium, magnesium, and aluminum! 
6 0
3 years ago
Read 2 more answers
How does kinetic energy connect or relate to Newtons second law of motion?
Orlov [11]
Newtons second law of motion: "T<span>he acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."

kinetic energy is energy that an object posses while in motion and to get that it must have potential energy.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of Newton's Three Laws does the following statement satisfy?
    6·2 answers
  • Which statement best describes an isolated system?
    5·2 answers
  • A small circular loop of 5 mm radius is placed 1 m away from a 60-Hz power line. The voltage induced on this loop is measured at
    15·1 answer
  • A 0.40-kg object is traveling to the right (in the positive direction) with a speed of 4.0 m/s. After a 0.20 s collision, the ob
    8·1 answer
  • A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound
    14·1 answer
  • All of the following are ways that an electromagnetic can be made stronger EXCEPT-
    11·1 answer
  • A 0.050 kg toy truck moving right at 0.20 m/s collided with a toy car weighing 0.015 kg initially at rest, on a frictionless tra
    14·2 answers
  • A sound wave has a speed of 345 m/s and a wavelength of 500 meters. Is it infrasonic, sonic, or ultrasonic
    15·1 answer
  • A new piece of exercise equipment has been added to your gym, and you try it out. To use this machine, you lie horizontal on a m
    14·1 answer
  • The mass of an object is 84 kg. Find its weight on the Earth and the Moon.​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!