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Highly selective Backlog Qs for JEE MainPhysicsMotion in One Dimension

A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ~ms ⁻¹ to 20 ~ms ⁻¹ while passing through a distance 135 ~m in t second. The value of t is

Options

  1. A9
  2. B10
  3. C1.8
  4. D12

Correct answer

A. 9

Step-by-step solution

a= V_f^2-V_i^2 2 S , t= V_f-V_i a or S= 1 2 (u+v) t

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