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 ENGLISH|Exercise Assertion- Reasoning|13 Videos

  • GRAVITATION

    CENGAGE PHYSICS ENGLISH|Exercise Linked Comprehension|23 Videos

  • GRAVITATION

    CENGAGE PHYSICS ENGLISH|Exercise Single Correct|122 Videos

  • FLUID MECHANICS

    CENGAGE PHYSICS ENGLISH|Exercise INTEGER_TYPE|1 Videos

  • KINEMATICS-1

    CENGAGE PHYSICS ENGLISH|Exercise Integer|9 Videos

Similar Questions

Explore conceptually related problems

Satellites in Circular Orbit

A satellite is revolving round the earth in circular orbit

A satellite is revolving round the earth in circular orbit

An earth satellite is revolving in a circular orbit of radius a with velocity upsilon_(0) . A gun in the satellite is aimed directly towards the earth. A bullet is fired from the gun with muzzle velocity (upsilon_(0))/(2) . Neglecting resistance offered by cosmic dust and recoil of gun, calculate maximum and minimum distance of bullet from the center of earth during its subsequent motion.

An artificial satellite (mass m) of a planet (mass M) revolves in a circular orbit whose radius is n times the radius R of the 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 on to the planet's surface.

What is the energy of a satellite revolving in a stable orbit.

Two earth-satellite are revolving in the same circular orbit round the centre of the earth. 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

If L is the angular momentum of a satellite revolving around earth is a circular orbit of radius r with speed v , then

A satellite moves round the earth in a circular orbit of radius R making one revolution per day. A second satellite moving in a circular orbit, moves round the earth one in 8 days. The radius of the orbit of the second satellite is

Home
Profile