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AP EAMCET20227 Jul 2022Evening ShiftPhysicsMotion in One DimensionActual

A car is moving along a straight line is brought to a stop within a distance of 200 ~m and in time 10s. The initial speed of the car is

Options

  1. A25 ~ms ⁻¹
  2. B50 ~ms ⁻¹
  3. C25 ~ms ⁻¹
  4. D25 ~ms ⁻¹

Correct answer

D. 25 ~ms ⁻¹

Step-by-step solution

Given, displacement of car, s=200 ~m Time taken, t=10 ~s Final velocity of car =0 Now using, Average velocity time = Displacement or ( v+u 2 ) t=s We get, ( 0+u 2 ) 10=200 u= 200 2 10 =40 ~m / s Hence, initial speed of car =40 ~m / s .

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