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A planet revolves around the sun in an e...

A planet revolves around the sun in an elliptical orbit. Suppose that the gravitational attraction between the sun and the planet suddenly disappear then the planet would move

A

towards the sun in a spiral path

B

away from the sun along a straight path with continuously increasing speed

C

with constant speed along a tangential path to the oribt

D

towards the sun along a straight path with constant speed

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A planet revolves around the sun in an elliptical orbit. If v_(p) and v_(a) are the velocities of the planet at the perigee and apogee respectively, then the eccentricity of the elliptical orbit is given by :

    A
    `(v_(p))/(v_(a))`
    B
    `(v_(a)-v_(p))/(v_(a)+v_(p))`
    C
    `(v_(p)+v_(a))/(v_(p)-v_(a))`
    D
    `(v_(p)-v_(a))/(v_(p)+v_(a))`

  • A planet revolves around the sun in elliptical orbit of eccentricity 'e'. If 'T' is the time period of the planet then the time spent by the planet between the ends of the minor axis and major axis close to the sun is

    A
    `(T pi)/(2e)`
    B
    `T((2e)/(pi)-1)`
    C
    `(Te)/(2pi)`
    D
    `T((1)/(4)-( e)/(2pi))`

  • If a planet revolves around the sun in a circular orbit of radius a with a speed of revolution T, then (K being a positive constant

    A
    `T = Ka^(2//3)`
    B
    `T = Ka^(3//2)`
    C
    `T = Ka^(2)`
    D
    `T = Ka^(3)`

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