Inclined Planes Wedges Screws Inclined Plane An inclined

Inclined Planes, Wedges, & Screws

Inclined Plane • An inclined plane or ramp is a tilted surface which allows a resistance to be lifted with less effort.

Inclined Plane • As usual, the reduction in effort is accompanied by an increase in _____.

Inclined Plane • As usual, the reduction in effort is accompanied by an increase in distance.

Inclined Plane • The AMA of the inclined plane is the resistance divided by the effort. AMA = resistance effort

Inclined Plane • The IMA of the inclined plane is the incline length divided by the height. incline length IMA = height

Inclined Plane incline length IMA = height

TYPES OF INCLINED PLANES

Wedge • A wedge is normally shaped like two inclined planes back to back. • It is used to split an object as it is forced into the object.

Wedge • The IMA of a wedge is calculated the same as the IMA of the inclined plane. incline length IMA = width

Wedge • How would one increase the IMA of a wedge? incline length IMA = width

Wedge • How would one increase the IMA of a wedge? • The more narrow the wedge, the greater the IMA. incline length IMA = width

• A screw is an inclined plane wrapped around a central shaft in a spiral shape.

• The ridges on a screw’s shaft are called threads. • The distance between threads is called the pitch.

• How would one increase the IMA of a screw?

• How would one increase the IMA of a screw? • The lower the pitch, the higher the MA.

Screw Low Pitch High Pitch

What is the MA of this ramp? 1. 2. 3. 4. 0. 375 1. 5 2. 67 4 m 1. 5 m Question