એક \(m\) દળનો અવકાશયાત્રી પૃથ્વીની સપાટીથી \(h\) અંતરે એક ઉપગ્રહમાં કાર્ય કરે છે.પૃથ્વીની ત્રિજ્યા \(R\) અને દળ \(M\) છે.અવકાશયાત્રી પર લાગતું ગુરુત્વાકર્ષણ બળ \(F_G\) કેટલું હશે?

A શૂન્ય કારણ કે અવકાશયાત્રી વજનરહિતતા અનુભવે
B \(\frac{{GMm}}{{{{\left( {R + h} \right)}^2}}} < {F_G} < \frac{{GMm}}{{{R^2}}}\)
C \({F_G} = \frac{{GMm}}{{{{\left( {R + h} \right)}^2}}}\)
D \(0 < {F_G} < \frac{{GMm}}{{{R^2}}}\)

Verified Solution

Answer & Solution

Correct Answer

(C) \({F_G} = \frac{{GMm}}{{{{\left( {R + h} \right)}^2}}}\)

Step-by-step Solution

Detailed explanation

According to universal law of Gravitation, Gravitational force \(F = \frac{{GMm}}{{{{\left( {R + h} \right)}^2}}}\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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