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QAIPMT-2004-Ph-2652: NEET 2004 Physics - Class 11 AIPMT-2004-Ph-2652 Solution: The density of a newly discovered planet is twice that of…
The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, the radius of the planet would be
Multiple Choice Options
- A 2R
- B 4R
- C
- D
Step-by-Step Verified Solution
From equation of acceleration due to gravity.
g e = G M e R e 2 = G ( 4 / 3 ) � R e 3 R e 2 _ e
g e _ R e _ e
Acceleration due to gravity of planet
g p _ R p _ p
_ R e _ e = R p _ p _ R e _ e = R p 2 _ e
_ R e = 1 2 R ( _ R e = R)