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Concepts Of Physics MCQ Edition [Volume 1]PhysicsRest and Motion Kinematics

An athlete requires 2.0 s to reach his maximum speed of 18.0 km/h . Determine the magnitude of his average acceleration in m/s ^2 .

Options

  1. A9.0
  2. B5.0
  3. C2.5
  4. D18.0

Correct answer

C. 2.5

Step-by-step solution

Initial velocity, u = 0 Final velocity, v = 18.0 km/h = 18.0 5 18 m/s = 5.0 m/s Time taken, t = 2.0 s Average acceleration, a = v - u t a = 5.0 - 0 2.0 = 2.5 m/s ^2

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