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Gravitation question

2021 · 31 Aug · Shift 1 · Q52
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Gravitation question

2021 · 31 Aug · Shift 1 · Q52

JEE MainPhysicsGravitationMCQ+4 / −1
The masses and radii of the earth and moon are (M1, R1) and (M2, R2) respectively. Their centres are at a distance 'r' apart. Find the minimum escape velocity for a particle of mass 'm' to be projected from the middle of these two masses :
  1. A
    V=124G(M1+M2)rV = {1 \over 2}\sqrt {{{4G({M_1} + {M_2})} \over r}}V=21​r4G(M1​+M2​)​​
  2. B
    V=4G(M1+M2)rV = \sqrt {{{4G({M_1} + {M_2})} \over r}}V=r4G(M1​+M2​)​​
  3. C
    V=122G(M1+M2)rV = {1 \over 2}\sqrt {{{2G({M_1} + {M_2})} \over r}}V=21​r2G(M1​+M2​)​​
  4. D
    V=2G(M1+M2)rV = {{\sqrt {2G} ({M_1} + {M_2})} \over r}V=r2G​(M1​+M2​)​
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