i have a problem with the equation , v = u + at v = u + at or t = (v - u)/a if a body starts its motion at rest accelerates and then retardates coming to rest initial velocity(u) = 0 and final velocity(v) = 0 according to the equation t = (v - u)/a ; v = 0 and u = 0 so the time taken should be 0 - 0/a thats equal to 0.

Asked by DIVYANSHU VADEHRA | 11th Apr, 2013, 09:21: PM

Expert Answer:

if a body starts its motion at rest accelerates and then retardates coming to rest initial velocity(u) = 0:
 
so the whole journey is divided in 2 parts.first part accelerated and second part retarded part.
 
it can not be taken u=0 and v=0.

Answered by  | 12th Apr, 2013, 10:05: AM

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