Friday, September 23, 2011

What are the forces on a frictionless inclined plane?

I have a block on a inclined plane. There is motion pointing down parallel to the plane. I know the normal force is perpendicular to plane and weight is pointing down. Is there another force acting on this frictionless plane?|||If the block is being pulled up the plane, then there is that force. If the block is just sliding down on a frictionless plane, then weight (gravity) and normal force are the only forces acting on the block.





Technically, there are other forces (like air resistance), but they are so small at the velocity that they are disregarded.|||Assuming you are ignoring air resistance and the block is not touching anything but the inclined plane, the only forces are the normal and the weight.

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