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5 Jul 2009 16:10:58 IST

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A particle is thrown vertical up with u =40m/sec from ground at same instant another particle is dro

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A particle is thrown vertical up with u =40m/sec from ground at same instant another particle is dropped from 100 m high building. find time taken by particle to collide. find position of collision.

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Anirudh Kumar

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Joined: 25 Jan 2009

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5 Jul 2009 17:00:44 IST

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relative velocity of aprticle A w.r.t to particle B

time taken to coliide = 100/ 40

= 2.5 s

b) for paticle dropped from 100 m

s= gt²/2

s = 10*6.25/2

s = 31.25 m

point of collision above the ground = 100 - 31.25 = 68.75 m

Krishna Gopal Singh

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Joined: 29 Dec 2006

Posts: 5153

5 Jul 2009 23:59:14 IST

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Right answer Anirudh. Well done.

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