Multiple choice

The mass of the earth is approximately

  1. 6 × 1022 kg

  2. 6 × 1023 kg

  3. 6 × 1024 kg

  4. 6 × 1020 kg

  5. 6 × 1021 kg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As we know that, F = GMm/ R2.
Where G = Gravitational constant, M = mass of the earth, m = mass of the another body at the surface of the earth, R = Radius of the earthor, F= ma ( here a = g) ma = GMm/ R2 Or M = g, R2/ GOr M = 9.8 (6.4×106)2 / 6.67 × 10 – 11 = 6× 1024 kg. It is the correct option

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