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Motion in Straight Line
Question
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We can make an artificial satellite to revolve around the moon at a height of 50km from its surface but it is not possible to make an artificial satellite to revolve around the earth at a height of 50km from its surface. Explain why.

Answer

An artificial satellite can revolve around the moon at a height of 50km from its surface because the moon has no atmosphere.
The earth binds the atmosphere and its height is about 400km. Therefore, it is not possible to make an artificial satellite revolve around the earth at a height of 50km from its surface.
Due to air friction, the satellite will lose the energy and falls on the surface of the earth.

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Some More Questions From Motion in Straight Line Chapter

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?

A body is thrown with a velocity of 9.8 m/s in the vertical upward direction. What is the velocity after one second?