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Question

Two particles A and B are at vertical separation of 20 m. At t = 0 particle A is projected vertically upwards with velocity 20 m/s whereas B is just dropped along same line of motion as shown. At what height above the ground particles will collide? [g = 10 m/s2]

दो कण A तथा B, 20 m की ऊर्ध्वाधर दूरी पर हैं। t = 0 पर कण A को 20 m/s के वेग से ऊर्ध्वाधर रूप से ऊपर की ओर प्रक्षेपित किया जाता है, जबकि B को ठीक इसी समय पर दर्शाए अनुसार गति की समान रेखा के अनुदिश गिराया जाता है। धरातल से कितनी ऊँचाई पर कण एक दूसरे से टकराऐंगे? [g = 10 m/s2]


A
15 m
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B
5 m
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C
10 m
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D
6 m
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Solution

The correct option is A 15 m
Solution

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