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JEE Main202226 Jul 2022Morning ShiftPhysicsGravitationActual

The percentage decrease in the weight of a rocket, when taken to a height of 32 km above the surface of earth will, be (Radius of earth = 6400 km )

Options

  1. A1 %
  2. B3 %
  3. C4 %
  4. D0 . 5 %

Correct answer

A. 1 %

Step-by-step solution

Acceleration due to gravity at a height h < < R is g ' = g 1 - 2 h R Now, change in g is ∴ Δ g g = 2 h R Percentage change is ⇒ Δ g g × 100 = 2 h R × 100 = 2 × 32 6400 × 100 = 1 %

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