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A particle is taken to a height R above ...

A particle is taken to a height R above the earth's surface, where R is the radius of the earth. The acceleration due to gravity there is

A

`2.45m//s^(2)`

B

`4.9m//s^(2)`

C

`9.8m//s^(2)`

D

`19.6m//s^(2)`

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