Just for kicks:

A ball of mass 4kg is projected and the range is found to be 10 meters..
The same ball is again projected with the same velocity and angle, except that this time, at the highest point of its trajectory, it explodes into 2 fragments of mass 1kg and 3kg...the instantaneous velocities of both masses just after the explosion is horizontal..

Finally, the mass 1kg is found at a distance of 3m from the point of projection...(assume that the fragments stick to the ground on contact)
Specify the location of the 3kg fragment...

7 comments:

  1. KapilApril 7, 2010 at 9:33 PM

    37/3 m from point of projection

    ReplyDelete
  2. Sambhav GuptaApril 7, 2010 at 11:00 PM

    exactly the same..

    ReplyDelete
  3. akash rupelaApril 8, 2010 at 12:02 AM

    same, oral question!

    ReplyDelete
  4. AnujApril 8, 2010 at 1:12 AM

    cool...you're definitely an EXCEEDS EXPECTATIONS people..

    ReplyDelete
  5. ankush sachdevaApril 8, 2010 at 9:39 AM

    shudnt there be 2 answers
    "mass 1kg is found at a distance of 3m from the point of projection"

    its net displacement can be 2 or 8

    i got
    37/3 and 21

    ReplyDelete
  6. akash rupelaApril 8, 2010 at 3:28 PM

    oh, u are right!

    ReplyDelete
  7. Sambhav GuptaApril 8, 2010 at 4:41 PM

    ya....we woud have lost some marks had this been a 'more than one correct' type question, even though we would have known how to do it....

    nice yr ankush..!

    ReplyDelete

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