Physics
General
Easy

Question

The masses and radius of earth and moon are M1 ,Rand M2 Rrespectively. Their centres are d distance of apart. The minimum velocity with which a particle of mass  should be projected from a point mid way between their centres so that it escapes to infinity is……

  1. 2 square root of G over d open parentheses M subscript 1 plus M subscript 2 close parentheses end root
  2. 2 square root of fraction numerator 2 G over denominator d end fraction open parentheses M subscript 1 plus M subscript 2 close parentheses end root
  3. 2 square root of fraction numerator G m over denominator d end fraction end root open parentheses M subscript 1 plus M subscript 2 close parentheses
  4. 2 square root of fraction numerator G m open parentheses M subscript 1 plus M subscript 2 close parentheses over denominator d open parentheses R subscript 1 plus R subscript 2 close parentheses end fraction end root

The correct answer is: 2 square root of G over d open parentheses M subscript 1 plus M subscript 2 close parentheses end root

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