Question
Download Solution PDFद्रव्यमान 20 kg की ऊर्जा को उस समय ज्ञात करें जब वह ज़मीन से 2 m की ऊँचाई पर हो। दिया गया है, g = 10 m s–2।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFविकल्प 2 सही है, यानी 400 जूल ।
अवधारणा :
- स्थितिज ऊर्जा (PE): किसी निकाय द्वारा अपनी स्थिति या विन्यास के आधार पर रखी गई ऊर्जा को स्थितिज ऊर्जा कहा जाता है ।
\(PE = mgh\)
जहाँ m = निकाय का द्रव्यमान और g = त्वरण गुरुत्वाकर्षण के कारण और h = निकाय की ऊँचाई
गणना:
दिया गया है:
वस्तु का द्रव्यमान, m = 20 kg,
विस्थापन (ऊंचाई), h = 2 m, और
गुरुत्वाकर्षण के कारण त्वरण, g = 10 m s–2।
स्थितिज ऊर्जा = mgh = 20 × 10 × 2 = 400 J
तो विकल्प 2 सही है।
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