Verified Solution • 2025–26 Session moderate

QNEET-2019-Ph-811: NEET 2019 Physics - Class 11 NEET-2019-Ph-811 Solution: The work done to raise a mass m from the surface of the earth…

The work done to raise a mass m from the surface of the earth to a height h which is equal to the radius of the earth is: mgR 2mgR 12mgR\frac{1}{2}mgR 32mgR\frac{3}{2}mgR

Multiple Choice Options

  • A mgR
  • B 2mgR
  • C 12{1 \over 2} 2 1 _ mgR
  • D 32{3 \over 2} 2 3 _ mgR

Step-by-Step Verified Solution

Initial potential energy at Earths surface is U i = _ G M m R Final potential energy at height h = R : U f = _ G M m 2 R work done = change in PE w = U f - U i = G M m 2 R = g R 2 m 2 R = 1 2 mgR

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