Inclined PlanesInclined PlanesScrewsScrewsWedgesWedges

What is an inclined plane?What is an inclined plane?

An inclined plane is a form of simple An inclined plane is a form of simple machine that consists of a slanted machine that consists of a slanted surface along which objects are surface along which objects are easier to push upward that to lift easier to push upward that to lift straight up.straight up.

A ramp and stairs are both examples A ramp and stairs are both examples of inclined planes.of inclined planes.

Length and Height of Inclined Length and Height of Inclined PlanesPlanes

It is easier to move an object up a It is easier to move an object up a more sloping (longer in length) more sloping (longer in length) inclined plane than it is to move the inclined plane than it is to move the same object up a steeper (shorter in same object up a steeper (shorter in length) inclined plane.length) inclined plane.

Example: It would be easier to ride a Example: It would be easier to ride a bike up a longer but shorter hill.bike up a longer but shorter hill.

Sloping HillSteep

Hill

Why do you use an inclined plane?Why do you use an inclined plane? Incline planes reduce the effort Incline planes reduce the effort

needed to carry something over a needed to carry something over a long distance or to raise something long distance or to raise something to a higher level.to a higher level.

Examples of Inclined PlanesExamples of Inclined Planes

More Examples of Inclined PlanesMore Examples of Inclined Planes

What is a screw?What is a screw?

A screw is a simple machine A screw is a simple machine consisting of a pole or rod with an consisting of a pole or rod with an inclined plane wrapped around it. inclined plane wrapped around it.

Screws are used for holding things Screws are used for holding things together (wood screws), drilling holes together (wood screws), drilling holes in things (drills), and lifting things in things (drills), and lifting things (car jacks). (car jacks).

Common Examples of ScrewsCommon Examples of Screws

What is a wedge?What is a wedge?

A wedge is another version of the A wedge is another version of the inclined plane. Usually it is thought of inclined plane. Usually it is thought of as two inclined planes put back to as two inclined planes put back to back. back.

Wedges help us cut things, chop Wedges help us cut things, chop things, and split things apart. They things, and split things apart. They are also used to hold things in place.are also used to hold things in place.

Axes, knives, and scissors are all Axes, knives, and scissors are all wedges.wedges.

Common Examples of WedgesCommon Examples of Wedges

Inclined Plane, Wedge, or Screw?Inclined Plane, Wedge, or Screw?

Name the Simple Machines UsedName the Simple Machines Used