A particle is moving eastwards with a ve...

A particle is moving eastwards with a velocity of ` 5 ms_(-1)`. In `10 seconds` the velocity changes to `5 ms^(-1)` northwards. The average acceleration in this time is

`1/sqrt2 ms^-2` towards north-west

`1/sqrt2 ms^-2` towards north-east

`1/2 ms^-2` towards north - west

zero

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