A wedge comes between
When the edge comes between,
Like a knife makes cuts
Or a rake makes ruts.
An incline plane that can move,
Is called a wedge.
It increases the force,
When it starts with its thin edge.
A wedge ‘neath the door,
Will stick to the floor,
It pushes up when the door pushes down.
There’s wedges in zippers, or pancake flippers,
Or scissors that can cut out a crown.