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A particle is moving eastwards with a velocity of 5 ~m / s in 10 seconds the velocity changes to 5 ~m / s northwards. The average acceleration in this time is

Options

  1. A1 2 ~m / s ^2 towards north-east
  2. B1 2 ~m / s ^2 towards north.
  3. Czero
  4. D1 2 ~m / s ^2 towards north-west

Correct answer

D. 1 2 ~m / s ^2 towards north-west

Step-by-step solution

a = V _ f - V _ i t = 5 j -5 i 10 = 1 2 ( j - i ) a = 1 2 ~ms ⁻² towards north west

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