Simple Machines

Front

Device that is thick on one end and tapers to a thin edge on the other end. Can be considered as 2 inclined planes back-to-back.

Back

wedge

Front

An inclined plane wrapped around a cylinder. The closer the threads, the greater the mechanical advantage.

Back

screw

Front

A flat, slanted surface. Allows input force to be exerted over longer distances.

Back

inclined plane

Front

A grooved wheel with a rope, chain, or cable wrapped around it which can be pulled to change the direction and force on an object. This simple machine can be fixed, movable, or part of a system.

Back

pulley

Front

A rigid bar that is free to pivot or rotate about a fixed point called a fulcrum. There are 3 classes of this simple machine.

Back

lever

Front

Two cylindrical objects that are fastened together and rotate about a common axis.

Back

wheel and axle

Front

Which surface created the most friction in the friction lab? Options: Dragging the brick across a wooden board, Dragging the brick across sandpaper, Dragging the brick across waxed paper, Dragging the brick across Mr. Ellis

Back

Dragging the brick across sandpaper.

Front

Using a lubricant decreases friction between two surfaces.

Back

True

Front

Force decreases when motion transfers from axle to wheel and magnifies when it transfers from wheel to axle.

Back

true