SSC GD Constable previous year question
Two solid spheres of equal round shape made of an iron alloy touch each other. If the density of the ball material is (3/2π)×10⁵ kg/m³ and the radius is 1 m, what will be the gravitational force of attraction between them? (G = 6.67×10⁻¹¹ Nm²/kg²)
Asked in SSC GD Constable 2025: 10 Feb 2025 Shift 2 (Afternoon) · General Awareness
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Correct answer: (C) 0.667 N
Mass of each sphere = density × volume = (3/2π)×10⁵ × (4/3)π(1)³ = 2×10⁵ kg. Distance between centres = 2 m. F = G·m₁m₂/r² = 6.67×10⁻¹¹ × (2×10⁵)²/4 = 0.667 N.
हिंदी में प्रश्न
लौह मिश्र धातु की समान गोल आकार की दो ठोस गेंदें एक दूसरे से स्पर्श कर रही हैं। यदि गेंद की सामग्री का घनत्व (3/2π)×10⁵ kg/m³ और त्रिज्या 1 m है, तो उनके बीच गुरुत्वीय आकर्षण बल क्या होगा? G = 6.67×10⁻¹¹ Nm²/kg²
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सही उत्तर: (C) 0.667 N
प्रत्येक गोले का द्रव्यमान = घनत्व × आयतन = (3/2π)×10⁵ × (4/3)π(1)³ = 2×10⁵ kg। केंद्रों के बीच दूरी = 2 m। F = G·m₁m₂/r² = 6.67×10⁻¹¹ × (2×10⁵)²/4 = 0.667 N।
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