Every planet revolves around the sun in an elliptical orbit :A. The force acting on a planet is inversely proportional to square of distance from sun.B. Force acting on planet is inversely proportional to product of the masses of the planet and the sun.C. The centripetal force acting on the planet is directed away from the sun.D. The square of time period of revolution of planet around sun is directly proportional to cube of semi-major axis of elliptical orbit.Choose the correct answer from the options given below :A and D onlyC and D onlyB and C onlyA and C only

A planet revolves in elliptical orbit around the sun. The linear speed of planet will be minimum

Choose the incorrect statement from the following:The speed of satellite in a given circular orbit remains constantFor a planet revolving around the sun in an elliptical orbit, the total energy of the planet remains constantThe linear speed of a planet revolving around the sun remains constantWhen a body falls towards earth, the displacement of earth towards the body is negligible

A light planet is revolving around a massive star in a circular orbit of radius R with a period of revolution T. If the force of attraction between planet and star is proportional to R−3/2 then choose the correct option :T2∝R5/2T2∝R7/2T2∝R3/2T2∝R3

Two satellites are monitored as they orbit the Earth; satellite X is four times as far from the Earth's center as is satellite Y. From Kepler's third law one may conclude that the period of revolution of X is what factor times that of Y?Select one:a.2.0b.8.0c.22.6d.1/2

Which of the following best explains Earth's motion? Select one:Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.highlight_offThe gravitational force pulling Earth toward the sun is equal to the force pulling the sun toward Earth.highlight_offThere is no force acting on Earth because space is empty and nothing touches Earth.highlight_offThe sun moves in an elliptical orbit around Earth, and the