$R$ त्रिज्या के किसी ऊर्ध्वाधर पाश (लूप) में $m$ द्रव्यमान के किसी पिण्ड को किस निम्नतम वेग से प्रवेश करना चाहिए कि वह पाश को पूर्ण कर सके?
- A$\sqrt{ gR }$
- B$\sqrt{2 gR }$
- C$\sqrt{3 gR }$
- ✓$\sqrt{5 gR }$
Answer: D.
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Answer: D.
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Answer: A.
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