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A car moving with a speed of 25 ms^(-1) ...

A car moving with a speed of 25 `ms^(-1) ` takes a U-turn in 5 seconds, without changing its speed. The average acceleration during these 5 seconds is

A

`10 m//s^(2)`

B

`5 m//s^(2)`

C

`2 m//s^(2)`

D

`7 m//s^(2)`

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