MPSC Rajyaseva 2016 GS Paper 1 — Question 45
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एक वस्तू निर्वात पोकळीतून गुरुत्वाकर्षण क्रिये अंतर्गत मुक्तपणे खाली पडत आहे. अश्या प्रकारच्या क्रियेमध्ये खालीलपैकी कोणत्या बाबी स्थिर राहतील ? A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities remains constant during the fall ?
1)गतिज उर्जा / Kinetic energy
2)स्थितिज उर्जा / Potential energy
3)संपूर्ण यांत्रिक उर्जा / Total mechanical energy✓ Correct
4)संपूर्ण एकरेखीय संवेग / Total linear momentum
When a body falls freely under gravity in a vacuum, mechanical energy (sum of kinetic and potential energy) remains conserved and constant due to the absence of dissipative forces like air resistance.
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