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A block is kept on a frictionless inclin...

A block is kept on a frictionless inclined surface with angle of inclination `alpha`. The incline is given an acceeration 'a' to keep the block stationary Then 'a' is equal to
.

A

`(g)/(tanalpha)`

B

`g cos ecalpha`

C

`g`

D

`g tan alpha`

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The correct Answer is:
D
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