An object is kept on a smooth inclined plane of height 1 and slant height \( l \). The horizonta...

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An object is kept on a smooth inclined plane of height 1 and slant height \( l \). The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to the inclined is
[UP CPMT 2006]
(a) \( g \sqrt{l^{2}-1} \)
(b) \( g\left(l^{2}-1\right) \)
(c) \( \frac{g}{\sqrt{l^{2}-1}} \)
(d) \( \frac{g}{l^{2}-1} \)
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