NEET UG Gravitation — practice questions
19 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Gravitation in the app →A planet's semi-major axis is doubled. Its orbital period changes by a factor of approximately:Two coins of unequal mass are dropped from a balcony in vacuum. They reach the floor:Earth's escape speed at the surface is about (taking $g = 9.8$ m/s$^2$, $R = 6.4\times 10^6$ m):A satellite of mass $m$ in a circular orbit of radius $r$ around a planet of mass $M$ has total mechanical eneKepler's first law of planetary motion states that:Kepler's third law (Law of Periods) gives the relation between the time period T and semi-major axis a of a plNewton's universal law of gravitation states that the force between two point masses m₁ and m₂ separated by diThe value of the universal gravitational constant G is approximately:The acceleration due to gravity at the Earth's surface, g, is related to its mass M and radius R by:At a height h above the Earth's surface (h ≪ R), the acceleration due to gravity g(h) is approximately:At a depth d below the Earth's surface (d ≪ R), the acceleration due to gravity is approximately:The escape speed from the surface of a planet of mass M and radius R is given by:Escape velocity from the Earth's surface (g = 9.8 m s⁻², R = 6.4 × 10⁶ m) is closest to:The orbital speed of a satellite in a circular orbit of radius r around a planet of mass M is:The total mechanical energy of a satellite of mass m in a circular orbit of radius r around the Earth (mass M)A geostationary satellite orbits the Earth with a period equal to:If the radius of a planet shrinks to half while its mass is unchanged, the escape velocity from its surface wiInside a hypothetical spherical shell of uniform mass distribution, the gravitational field at any interior poThe gravitational potential energy of a system of two point masses m₁ and m₂ separated by distance r is taken