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In a car race on straight road, car A takes a time t less than car B at the finish and passes finishing point with a speed ’v’ more than that of car B. Both the cars start from rest and travel constant acceleration a1 and a2 respectively.  Then ‘v’ is equal to

a.

b.

c.

d.



Question ID - 50183 | SaraNextGen Top Answer

In a car race on straight road, car A takes a time t less than car B at the finish and passes finishing point with a speed ’v’ more than that of car B. Both the cars start from rest and travel constant acceleration a1 and a2 respectively.  Then ‘v’ is equal to

a.

b.

c.

d.

1 Answer
127 votes
Answer Key / Explanation : (d) -

For A & B let time taken by A is t0

From question,

VA−VB−V=(a1−a2)t0−a2t                     … (i)

XB=Xa= a1   a2 2 

    =

  t0 =                          … (ii)

Putting t0  in equation

V=(a1−a2 2t

= v=

  +

127 votes


127