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JEE Main202313 Apr 2023Evening ShiftPhysicsMotion in One DimensionActual

The distance travelled by an object in time t is given by s = 2 . 5 t 2 . The instantaneous speed of the object at t = 5 s will be :

Options

  1. A25   m   s – 1
  2. B5   m   s – 1
  3. C62 . 5   m   s – 1
  4. D12 . 5   m   s – 1

Correct answer

A. 25   m   s – 1

Step-by-step solution

It is given that s = 2 . 5 t 2 Differentiating, v = d s d t = d 2 . 5 t 2 d t = 5 t   At   t   =   5   s ,   v =   25   m   s - 1

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