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JEE Main2017PhysicsMotion in One DimensionActual

A car is standing 200  m behind a bus, which is also at rest. The two start moving at the same instant but with different forward accelerations. The bus has acceleration 2 m s - 2 and the car has acceleration 4   m s - 2 . The car will catch up with the bus after time :

Options

  1. A120 s
  2. B15   s
  3. C110   s
  4. D10 2 s

Correct answer

D. 10 2 s

Step-by-step solution

a CB = 2   m   sec - 2     200 = 1 2 × 2 t 2 t = 10 2   s

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