# 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: