Two cars C1 and C2 moving in the a same direction on a straight single lane road with velocities 12m/s and 10m/s respectively. When the separation between the two was 200m,C2 started accelerating to avoid a collision. What is the minimum acceleration of car C2 so that they don't collide?
1cm/s2
4cm/s2
2cm/s2
3cm/s2
A
4cm/s2
B
1cm/s2
C
2cm/s2
D
3cm/s2
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Solution
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The collision is just avoided if relative velocity becomes zero just at the moment the two cars meet each other. v12=0whens12=200 u12=2,¯a12=−a and s12=200
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