different answers???????

Asked by harshitalohia | 26th Dec, 2009, 12:28: PM

Expert Answer:

Because in the second part you are calculating the distance as,

d = Vt,

And it's only valid for uniform velocity, but in this example we have uniform acceleration and not uniform velocity.

s = ut+at2/2

and

v2-u2 = 2as

are the only two equation to be used while calculating displacement or straight line distance, if we have uniformly accelerated motion.

Regards,

Team,

TopperLearning.

Answered by  | 26th Dec, 2009, 12:33: PM

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