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in Physics by (49.5k points)

यदि गुटके व नत-तल के मध्य संघट्ट पूर्णतः प्रत्यास्थ हो, तब द्वितीय नत तल पर टकराने के तुरन्त पश्चात् बिन्दु B पर गुटके के वेग का ऊर्ध्वाधर (ऊपर की दिशा में) घटक होगा:

(a) √30m/s

(b) √15 m/s

(c) 0

(d) - √15 m/s

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