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
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