NDA Gravitation — practice questions
15 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NDA Gravitation in the app →Newton's universal law of gravitation gives the force between two masses m₁ and m₂ separated by distance r asThe gravitational constant G in SI units is approximatelyThe acceleration due to gravity g at height h above Earth's surface (radius R) is approximatelyKepler's third law of planetary motion states that the square of the orbital period T is proportional toThe value of g on the Moon's surface compared with Earth's g is aboutThe escape velocity from Earth's surface is approximatelyAn orbiting satellite has an orbital speed v = √(G M / r). If the orbital radius r is quadrupled, the new speeThe gravitational potential energy of two point masses m₁ and m₂ separated by distance r is (taking U = 0 at iA geostationary satellite orbits Earth at a height where its period equalsThe variation of g with depth d below Earth's surface (assuming uniform density) isThe weight of an object at a certain height above Earth's surface equals its weight at depth d = R/2 below theFor a body in a circular orbit around Earth of radius r, the ratio of kinetic energy to total mechanical energNewton showed that the same law that makes an apple fall to the ground alsoThe gravitational field near Earth's surface is approximately uniform becauseCavendish's torsion balance experiment (1798) measured