Q.

Two cars A and B cross a point P with velocities 10m/s and 15 m/s. after that they move with different uniform accelerations and the car A overtakes B with a speed of 25 m/s. Their accelerations are in the ratio

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a

3 : 1

b

2 : 1

c

3 : 2

d

4 : 3

answer is A.

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Detailed Solution

They have travelled for same distance for same time.So, s=v1+u12t=v2+u22t10+25=15+u2u2=20 m/sa1=252−1022Sa2=202−1522S     a1:a2=3:1
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Two cars A and B cross a point P with velocities 10m/s and 15 m/s. after that they move with different uniform accelerations and the car A overtakes B with a speed of 25 m/s. Their accelerations are in the ratio