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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A planet of radius R = 1/10×( radius of Earth ) has the same mass density as Earth. Scientists dig a well of depth R/5 on it and lower a wire of the same length and a linear mass density 10^−3 kg m(_1) into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it inplace is (take the radius of Earth = 6 × 10^6 m and the acceleration due to gravity on Earth is 10 m/s^2

A planet of radius R = 1/10×( radius of Earth ) has the same mass density as Earth. Scientists dig a well of depth R/5 on it and lower a wire of the same length and a linear mass density 10^−3 kg m(_1) into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it inplace is (take the radius of Earth = 6 × 10^6 m and the acceleration due to gravity on Earth is 10 m/s^2

each of mass M and equidistant from each other Four particles move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is: