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Motion in Straight Line
Question
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What is geostationary satellite? What are the conditions for satellite to appear stationary?

Answer

A satellite which appears to be stationary to an observer standing on the earth is known as a geostationary satellite.
The conditions for satellite to appear stationary are:
(i) The time-period should be 24 hours.
(ii) Its orbit should be in the equatorial plane of the earth.
(iii) Its direction of motion should be the same as that of the earth about its polar axis.

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Some More Questions From Motion in Straight Line Chapter

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.

Can magnitude of displacement be greater than distance travelled by particle?