A particle moves towards east with veloc...

A particle moves towards east with velocity `5m//s`. After `10 seconds` its direction changes towards north with same Velocity. The average acceleration of the particle is

Zero

`1/(sqrt(2))m//s^(2)N-W`

`1/(sqrt(2))m//s^(2)N-E`

`1/(sqrt(2))m//s^(2)S-W`

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