Question

Two cars are moving towards each other on a
straight road with accelerations 5 m/s2 and 15 m/s2.
At a certain instant, their separation is 400 m and
their velocities are 10 m/s and 20 m/s. How long will
it take for the cars to collide ?
(1) 12 s
(2) (2+√3)s
(3) 5 s
(4) (1+√5)s​

Answer 1

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