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Question

A particle moving, eastwards with a velocity of 5m/s. In 10s, its velocity changes to 5m/s northwards. The average acceleration in this time is
  1. Zero
  2. 12m/s2 towards north-west
  3. 12m/s2 towards north-east
  4. 12m/s2 towards north-west

A
Zero
B
12m/s2 towards north-west
C
12m/s2 towards north-east
D
12m/s2 towards north-west
Solution
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Initial velocity, u=5m/s eastwards

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