RRB Technician Grade 3 previous year question
A body of mass 10 kg is thrown vertically upwards with a velocity of 10 m/s. How much potential energy will be possessed by the body when it reaches the maximum height? (Take g = 10 m/s²)
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 2) · Science
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Correct answer: (A) 500 J
By energy conservation, all the initial kinetic energy converts to potential energy at maximum height: PE = KE_initial = ½mv² = 0.5×10×10² = 500 J.
हिंदी में प्रश्न
10 kg द्रव्यमान वाले किसी पिंड को 10 m/s के वेग के साथ ऊर्ध्वाधर दिशा में ऊपर की ओर फेंका जाता है। जब वह अधिकतम ऊंचाई तक पहुँच जाएगा तो उस पिंड की स्थितिज ऊर्जा कितनी होगी? (g = 10 m/s² लीजिए)
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सही उत्तर: (A) 500 J
ऊर्जा संरक्षण के अनुसार, अधिकतम ऊंचाई पर सारी प्रारंभिक गतिज ऊर्जा स्थितिज ऊर्जा में परिवर्तित हो जाती है: PE = ½mv² = 0.5×10×10² = 500 जूल।
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