Gravitation Question 355

Question: A shell is fired vertically from the earth with speed [VescN,] where Nis some number greater than one and V is escape speed for the earth. Neglecting the nation of the earth and air resistance, the maximum altitude attained by the shell will be is radius of the earth)

Options:

A) [N2REN21]

B) [NREN21]

C) [REN21]

D) [REN2]

Show Answer

Answer:

Correct Answer: C

Solution:

  • By conservation of energy

    [GMmRE+12mN2GM2RE=-GMmH]

    [H=N2REN21]

    Altitude [=HR=REN21]



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