Answer to Question #322829 in Field Theory for Lulu

Question

Motion along a frictionless inclined plane

Answer 1

Answer

For a frictionless incline of angle degrees, the acceleration is given by the acceleration of gravity times the sine of the angle.

And also

the plane is "frictionless" means that the plane does not exert any force on the block that is parallel to the surface. Therefore, any force exerted by the plane on the block must be perpendicular to the surface.