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A particle is moving eastwards with a ve...

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

A

`\frac { 1 } { \sqrt { 2 } } m / s ^ { 2 }` towards north-west

B

`\frac { 1 } { \sqrt { 2 } } m / s ^ { 2 }` towards north-east

C

`\frac { 1 } { \ 2 } m / s ^ { 2 }` towards north-west

D

`\frac { 1 } { \ 2 } m / s ^ { 2 }` towards north

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The correct Answer is:
A
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