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The earth, moving around the sun in a ci...

The earth, moving around the sun in a circular orbit, is acted upon by a force and hence work must be done on earth by this force.

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The Earth moving round the sun in a circular orbit is acted upon by a force and hence work must be done on the Earth by the force. Do you agree with this statement ?

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Knowledge Check

  • When a body moves in a circular path, no work is done by the force since,

    A
    There is no displacement
    B
    There is no net force
    C
    Force and displacement are perpendicular to each other
    D
    The force is always away from the centre

  • If the earth revolves round the sun in a circular orbit, then the necessary entripetal force will be provided by

    A
    weight of the earth
    B
    acceleration due to gravity
    C
    gravitational force of attaction between the sun and the earth
    D
    presence of atmosphere around the earth

  • r denotes the distance between the sun and the earth. Assume that the earth moves around the sun in a circular orbit of radius r. The angular momentum of the earth around the sun is proportional to

    A
    `r`
    B
    `r^(3)`
    C
    `sqrtr`
    D
    `r^(2)`

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    Earth revolved around the Sun in a circular orbit with a uniform speed . Is this motion uniform or accelerated ?

    Earth revolves around the Sun in a circular orbit with a uniform speed. Is this motion uniform or accelerated ?

    Assume that the earth moves around the sun in circular orbit of radius R and there exists a planet which also moves around the sun in a circular orbit with an radius of the orbit of the planet is

    Consider that the Earth is revolving around the Sun in a circular orbit with a period T. The area of the circular orbit is directly proportional to

    Assertion : A force act upon the earth revolving in a circular orbit about the sun. Hence work should be done on the earth. Reason : The necessary centripetal force for circular motion of earth comes from the gravitational force between earth and sun.

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