NEET PhysicsNCERT Class 11Gravitation

Gravitation: NEET questions with solutions

NEET uses this chapter for g at a height or depth, Kepler's second and third laws, escape and orbital speed, and the kinetic, potential and total energy of a satellite. Marks are lost by measuring distances from the surface instead of the centre, using the 1 − 2h/R approximation when h is not small, and giving a bound satellite positive total energy.

Revise first: NCERT notes for Gravitation

Questions

10 questions · answers after you pick

1A planet moves round a star in an elliptical orbit. Its closest distance from the star is 1.0 × 10¹¹ m, where its speed is 30 km s⁻¹, and…Kepler's lawsEasySingle correct 2A body weighs 72 N on the earth's surface. What would it weigh at a height above the surface equal to the earth's radius?g above and below the surfaceEasySingle correct 3Consider statements I to IV about the escape speed from the surface of a planet (atmosphere ignored). Select the option that names every…Escape speedEasyStatement based 4At a height of 32 km above the earth's surface the acceleration due to gravity has some value g′. Treating the earth as a uniform sphere and…g above and below the surfaceMediumSingle correct 5A satellite of mass m orbits the earth (mass M, radius R) in a circular orbit of radius 2R. How much energy must be supplied to shift it to…Energy of an orbiting satelliteHardSingle correct 6Satellite P circles a planet with period 8 h at orbital radius r. Satellite Q circles the same planet at radius 4r. The period of Q isEarth satellitesMediumSingle correct 7A planet has the same mean density as the earth but twice its radius. If the escape speed from the earth's surface is 11.2 km s⁻¹, the…Escape speedMediumSingle correct 8Why is a satellite bound to the earth? Weigh the Assertion (A) on the sign of its total mechanical energy against the Reason (R) comparing…Energy of an orbiting satelliteMediumAssertion–Reason 9A satellite of mass m moves in a circular orbit of radius r round a planet of mass M. Match each quantity in List I with its expression in…Earth satellitesMediumMatch the following 10At what height above the earth's surface does the acceleration due to gravity fall to 64% of its value at the surface? Take the earth's…g above and below the surfaceHardSingle correct

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