Question

Please explain the answer to this question step wise properly.


And In the solution pls tell that why do we have to take the distance as 3.84x 10^8 .... when it is given 3.84 x 10^5

Answer 1

Explanation:

F = GM1M2/ R²

we put in value of G, mass earth, mass moon and the distance

F = 6.7 x 10 ^-11 x 6 x 10²⁴ x 7.4 x 10²²/ (3.84 x 10⁸)²

F = 297.48 x 10³⁵ / 14.745 x 10¹⁶

F= 20.17 x 10 ¹⁹ N

we take 10⁸ since 10⁵ is taken wrt kilometres... to ck vert it to metres that is SI units we multiply by 1000

hope it helps

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Answer 2

The force is 20.17 × 10^25 N