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MHT CET20192 May 2019Morning ShiftPhysicsGravitationActual

The kinetic energy of a revolving satellite m a s s m at a height equal to thrice the radius of the earth R is

Options

  1. Am g R 8
  2. Bm g R 16
  3. Cm g R 2
  4. Dm g R 4

Correct answer

A. m g R 8

Step-by-step solution

K ⋅ E . = G M m 2 R + h K ⋅ E . = G M m 2 R + 3 R = G M m 8 R × R R = 1 m . 8 G M m R 2 ⋅ R K ⋅ E . = m g R 8 ∵ G M R 2 = g

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