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JEE Main20204 Sep 2020Morning ShiftPhysicsMotion in One DimensionActual

Starting from the origin at time t = 0 , with initial velocity 5 j ⏜ ms − 1 , a particle moves in the x - y plane with a constant acceleration of 10 i ⏜ + 4 j ⏜ ms − 2 . At time t , its coordinates are 20 m, y 0 m . The values of t and y 0 are, respectively:

Options

  1. A2   s and 18  m
  2. B4   s and 52  m
  3. C2   s and 24  m
  4. D5   s and 25  m

Correct answer

A. 2   s and 18  m

Step-by-step solution

Equation 1 S x = 1 2 a x t 2 20 = 1 2 × 10 × t 2 t = 2 Equation 2 S y = u y t + 1 2 a y t 2 y = 5 2 + 1 2 4 2 2 y = 18

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