Sc-5th-Ch9-Rev

.............................................. is a force applied to an object that displaces it or moves it in the direction of that force.

• electric motor

• work

• machines

The instruments that allow us to do a task with less effort are called ................................................

• electric motor

• work

• machines

The .............................................. is a machine that transforms electrical energy into mechanical energy through magnetic fields.

• electric motor

• work

• machines

The .............................................. is a machine used in agriculture to open furrows and turn the soil before sowing seeds.

• compound machine

• screw

• plow

A machine composed of two different simple machines is called a ................................................

• compound machine

• screw

• plow

The .............................................. consists of an inclined plane that forms a spiral around a cylindrical body.

• compound machine

• screw

• plow

point of support for a lever

• pulley

• fulcrum

• lever

a simple machine that consists of a rigid bar that turns on a fulcrum

• pulley

• fulcrum

• lever

a disk or wheel with a channel (or groove) on which a wheel passes

• pulley

• fulcrum

• lever

a simple machine in the shape of a circle that allows objects to move

• inclined plane

• wedge

• wheel