Home
Class 11
PHYSICS
Suppose an earth satellite, revolving in...

Suppose an earth satellite, revolving in a circular orbit experiences a resistance due to cosmic dust. Then

A

its kinetic energy will increase

B

its potential energy will decrease

C

it will spiral towards the earth and in the process its angular momentum will remain conserved

D

it will burn off ultimately

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
If a satellite is revolving in a circular orbit then the magnitude of its `KE` is equal to half of the magnitude of negative. That is why the total energy of a revolving satellite is negative. If the satellite experiences resistance due to cosmic dust, then it follows a spiral path of decreasing radius. During the process of motion, its potential energy decreases. It means `PE` becomes more negative or the magnitude of `PE` increases Hence, magnitude of `KE` also increases. Therefore, optioins a and b are correct.
Since cosmic dust exerts a tangential force on the satellite, therefore it experiences a retarding moment, hence, its angular momentum does not remain conserved. Hence option c in incorrect. Since `KE` increases. Power acting against the resisting force is equal to force `xx` speed, therefore it increases. Hence, thermal power generated increases with time. Hence, ultimately it will turn off. Therefore option d is correct.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • GRAVITATION

    CENGAGE PHYSICS|Exercise Assertion- Reasoning|13 Videos

  • GRAVITATION

    CENGAGE PHYSICS|Exercise Linked Comprehension|23 Videos

  • GRAVITATION

    CENGAGE PHYSICS|Exercise Single Correct|122 Videos

  • FLUID MECHANICS

    CENGAGE PHYSICS|Exercise INTEGER_TYPE|1 Videos

  • KINEMATICS-1

    CENGAGE PHYSICS|Exercise Integer|9 Videos

Similar Questions

Explore conceptually related problems

An earth satellite is revolving in circular orbit in equatorial plane, It is used for communication purpose. The satellite can transmit signals up to 60" latitude on earth. The angular velocity of satellite is

An artificial satellite of the Moon revolves in a circular orbit whose radius exceeds the radius of the Moon eta times. In the process of motion the satellite experiences a slight resistance due to cosmic dust. Assuming the resistance force to depend on the velocity of the satellite as F=av^2 , where alpha is a constant, find how long the satellite will stay in orbit until it falls onto the Moon's surface.

Knowledge Check

  • A satellite is revolving round the earth in circular orbit

    A
    if mass of earth is made four times, keeping other factors constant, orbital speed of satellite will become two times
    B
    corresponding to change in part(a), times period of satellite will become half
    C
    when value of `G` is made two times orbital speed increases and time period decreases
    D
    `G` has no effect on orbital speed and time period

  • Two earth-satellite are revolving in the same circular orbit round the centre of the earth. They must have the same

    A
    mass
    B
    angular momentum
    C
    kinetic enrgy
    D
    velocity

  • The astronaut in a satellite, moving in a circular orbit around the earth, experiences a feeling of weightlessness because

    A
    the gravitational force acting acting on the astronaut is zero
    B
    acceleration due to gravity of the earth is zero
    C
    the astronaut is in an inertial frame of reference
    D
    the floor of the satellite does not produce any reaction on the astronaut

    • Similar Questions

    Explore conceptually related problems

    An artificial satellite (mass m) of a planet (mass M) revolves in a circular orbit whose radius is n times the radius R of thhe planet in the process of motion the satellite experiences a slight resistance due to cosmic dust. Assuming the force of resistance on satellite to depend on velocity as F=av^(2) where 'a' is a constant caculate how long the satellite will stay in the space before it falls onto the planet's surface.

    An artificial satelite of the moon revolves in a circular orbit whose radius exceeds the radius of the moon eta times. The process of motion the satelite experiences a slight resistance due to cosmic dust. Assuming the resistance force to depend on the velocity of the satellite as F=alphav^2 , where alpha is a constant, find how long the satellite will stay in orbit until it falls onto the moon's surface.

    An earth's satellite is revolving in a circular orbit with a uniform speed. If the gravitational force suddenly disappears, the satellite will .............. .

    Two artificial satellites are revolving in the same circular orbit. Then they must have the same

    A satelite is revolving in a circular orbit at a height h above the surface of the earth of radius R. The speed of the satellite in its orbit is one-fourth the escape velocity from the surface of the earth. The relation between h and R is

    Home
    Profile