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NEET 2020 (Phase 1) · Acceleration Due to Gravity

Acceleration Due to Gravity question from NEET 2020 (Phase 1)

Q101NEET 2020 · PHASE 1Easy

Acceleration Due to Gravity

A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?

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Answer: (a)

  1. Wh=W(1+h/R)2W_h = \frac{W}{(1 + h/R)^2} with h=R2h = \frac{R}{2}.
  2. Wh=72×49=32 NW_h = 72 \times \frac{4}{9} = 32\ \text{N}
  3. So the answer is (a) 32 N.
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