A particle is moving eastwards with velo...

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

Zero

`(1)/(sqrt(2))ms^(-2)` towards north-west

`(1)/(sqrt(2)) ms^(-2)` towards north-east

`(1)/(2) ms^(-2)` towards north

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