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Motion In Straight Line

Question

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Two satellites are revolving around the earth. One which has time period of revolution 24 hours revolves in orbit of radius R. What is the radius of orbit of second satellite whose time period is 12 hours?

Solution

Given, two satellites are revolving around the Earth.
Time period of revolution of one satellite = 24 hours
Time period of the second satellite = 12 hours
According to Kepler’s third law,
T² ∝ R³
Let R’ be the radius of the orbit of the second satellite.
Therefore, the radius of the satellite is,

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straight R apostrophe equals open parentheses 1 fourth close parentheses to the power of 1 divided by 3 end exponent space straight R

Some More Questions From Motion in Straight Line Chapter

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.

Define distance.

Define displacement.

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