Question

12.A train starts from rest with an acceleration of 2m/s A man who is 9m behind
the train runs with uniform velocity of 10m/s to catch it. In how much time he
will catch the train. (Ans:1 sec or 9 sec)
13.A person walks up a stalled escalator in 90 seconds. When standing on the same
escalator, now moving he is carried up in to 60sec. How much time would it
take him to walk up the moving escalator.(Ans:36sec)
14. After falling through the first h meters, a freely falling body acquires velocity v,
what is the velocity acquired by it after falling through the next h meter.
(Ans: 2 v)
15.The average velocity of freely falling body is 7m/s. Then find the height from
where it is released. (Ans:10m)​

Answer 1

Answer:

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