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A brick of mass 2kg begins to slide down...

A brick of mass 2kg begins to slide down on a plane inclined at an angle of `45^(@)` with the horizontal. The force of friction will be

A

`19.6 sin 45^@`

B

`98 sin 45^@`

C

`19.6 cos 45^@`

D

`9.8 cos 45^@`

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