A block is kept on a frictionless

Question:

A block is kept on a frictionless inclined surface with angle of inclination $\alpha$. The incline is given an acceleration a to keep the block stationary. Then a is equal to-

  1. $\mathrm{g} / \tan \alpha$

  2. $g \operatorname{cosec} \alpha$

  3. $\mathrm{g}$

  4. $\operatorname{gtan} \alpha$


Correct Option: , 4

Solution:

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