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siddharth sharma

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we know that v2-u2=2as NOTE :[2 behind u or v is power of them] u= head of train 3u= tail of train [v=3u] so (3u)2-u2=2as 9u2-u2=2as 8u2=2as a=4u2/s Now at middle of train s'=s/2 v'2-u2=2as' v'2=u2+2as/2 put the value of a v'2= u2+2*4u2/s*s/2 v'2=5u2 v'=
we know that velocity is either change with magnitude or direction also. and Acceleration is rate of change of velocity. SO when object move along a curve or circular path, object having same magnitude but change the direction continuosly so it is

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