Q25 / 208 · NTA Abhyas (NEET) 2020 · Physics · Gravitation

A body is projected up with a velocity equal to 34th of the escape velocity from the surface of the earth. The height it reaches from the center of the earth is

  • A
    10R/9
  • Correct answer
    B
    16R/7
  • C
    9R/8
  • D
    10R/3

Solution

v=34ve

K.E.=12mv2=12m34ve2=932mve2=932m2GMR

916GMmR-GMmR=-GMmr

r=16R7

Hence, the correct answer is option: 'B'.

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