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Assertion: The planet move slower when t...

Assertion: The planet move slower when they are farther from the Sun than when they are nearer.
Reason : Angular velocity of a planet is a constant quantity.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are truebut reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
C
( c) Kepler's law of areas, the line that join any planet to the Sun sweeps equal areas is equal intervals of time as shown in figure.

The areal velocity of the planet around the sun is constant. To keep the areal velocity constant, the linear speed of the planet goes on changing. The linear speed is more, when the planet is close to the Sun and less, when it is away from the sun.
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Knowledge Check

  • Assertion : A planet moves faster, when it is closer to the sun in its orbit and vice versa. Reason : Orbital velocity in orbital of planet is constant.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
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    C
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    A
    If both Assertion and Reason are true and the Reason Is the correct explanation of the Assertion,
    B
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    If Assertion Is correct but Reason Is Incorrect.
    D
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  • A satellite can be in a geostationary orbit around a planet at a distance r from the centre of the planet . If the angular velocity of the planet about its axis doubles, a satellite can saw be in a geostationary orbit around the planet if its distance from the centre of the planet is

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    B
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