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JEE Main 2023 (24 Jan, Shift 1) · Acceleration Due to Gravity

Acceleration Due to Gravity question from JEE Main 2023 (24 Jan, Shift 1)

Q55JEE Main 2023 · 24 JAN · SHIFT 1Easy

Acceleration Due to Gravity

The weight of a body at the surface of earth is 18 N. The weight of the body at an altitude of 3200 km above the earth's surface is (given, radius of earth Re=6400 kmR_e = 6400\text{ km}):

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Answer: (d)

  1. h=3200 km=R2h = 3200\ \text{km} = \frac{R}{2}.
  2. Wh=W(1+h/R)2=18×49W_h = \frac{W}{(1 + h/R)^2} = 18 \times \frac{4}{9}
  3. Wh=8 NW_h = 8\ \text{N}
  4. So the answer is (d) 8 N.
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