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An air craft executes a horizontal loop ...

An air craft executes a horizontal loop of radius ` 1 km` with steady speed of ` 900 km h^(-1)`. Compare its centripetal acceleration with the acceleration due to gravity.

A

`1:6.38`

B

`6.38:1`

C

`2.25:98`

D

`2.5:9.8`

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