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NDA 2 2024 GAT, question 65

Topic: Physics

Q65

An astronaut whose weight on the Earth is 600 N600\text{ N} experiences weightlessness on International Space Station orbiting around the Earth. It means that

  1. (a) acceleration of the astronaut is zero
  2. (b) normal reaction of the space-station floor on the astronaut is zeroCorrect answer
  3. (c) gravitational pull of earth on the astronaut is zero
  4. (d) space station applies a centrifugal force on the astronaut

Solution.

Answer: (b) normal reaction of the space-station floor on the astronaut is zero

  1. In free fall, the body and its support accelerate together under gravity.
  2. The normal reaction, which determines apparent weight, becomes zero.
  3. Gravity itself has not disappeared.