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Motion In Straight Line

Question
CBSEENPH11020682
Wired Faculty App

The radii of circular orbits of two satellites A and B of the earth are 4R and R, respectively. If the speed of satellite A is 3v. then the speed of satellite B will be

  • 3v/4

  • 6v

  • 12 v

  • 3v/2

Solution

B.

6v

Orbital velocity of satellite
straight v space equals space square root of GM over straight r end root fraction numerator straight v subscript straight A over denominator straight v subscript straight B space end fraction space equals space square root of straight r subscript straight B over straight r subscript straight A end root space equals space square root of fraction numerator straight R over denominator 4 straight R end fraction end root space equals 1 half therefore comma space straight v subscript straight A over straight v subscript straight B space equals space fraction numerator 3 straight v over denominator straight v subscript straight B end fraction space equals space 1 half therefore comma space straight v subscript straight B space equals space 6 straight v

Some More Questions From Motion in Straight Line Chapter

Is absolute rest or absolute motion possible?

What is the most essential thing to study the motion of a body?

Can a body be always at rest in some frame?

Can a body be in motion in the frame associated with the body itself?

When an object in motion can be considered as particle or point object?

Can you think of physical phenomena involving the moon in which moon cannot be treated as particle?

A train is crossing the bridge. Can it be taken as a particle?

Can a train be taken a particle? Give an example in support of your answer.

 A particle is moving along curved line in space. Is the motion one dimensional?

State which of the following are examples of one, two or three dimensional motion: 

(a) A kite flying in the sky.

(b) The earth revolving around the sun. 

(c) A train moving along the equator of the earth in clockwise direction. 

(d) Accelerated motion of a particle in a straight line.

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