Gravitation

Related Questions

• The escape velocity of an object from the earth depends upon the mass of the earth (M), its mean density $(\rho )$, its radius (R) and the gravitational constant (G). Thus the formula for escape velocity is

  ---

• The gravitational field due to a mass distribution is $E = K/{x^3}$ in the x-direction. (K is a constant). Taking the gravitational potential to be zero at infinity, its value at a distance x is

  ---

• If the mass of earth is 80 times of that of a planet and diameter is double that of planet and ‘g’ on earth is $9.8\,m/{s^2}$, then the value of ‘g’ on that planet is

  ---

• Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to

  ---

• The masses and radii of the earth and moon are ${M_1},\,{R_1}$ and ${M_2},\,{R_2}$ respectively. Their centres are distance d apart. The minimum velocity with which a particle of mass m should be projected from a point midway between their centres so that it escapes to infinity is

  ---