1
00:00:00,000 --> 00:00:03,379
Simple machines have few or no moving parts.

2
00:00:04,419 --> 00:00:06,299
There are six simple machines.

3
00:00:07,679 --> 00:00:08,839
A pulley,

4
00:00:10,060 --> 00:00:11,900
an inclined plane,

5
00:00:13,279 --> 00:00:14,439
a screw,

6
00:00:15,439 --> 00:00:17,100
a wheel and axle,

7
00:00:18,100 --> 00:00:19,300
a wedge,

8
00:00:21,260 --> 00:00:22,359
a lever and fulcrum.

9
00:00:24,640 --> 00:00:29,059
A pulley uses a wheel and a rope to lift or lower an object.

10
00:00:29,059 --> 00:00:42,340
An inclined plane is a slanting surface that connects a low level with a high level.

11
00:00:43,539 --> 00:00:46,219
We use it to move objects up or down.

12
00:00:54,240 --> 00:00:56,560
A screw is a type of inclined plane.

13
00:00:57,560 --> 00:01:01,240
We use it to hold things together or to lift objects.

14
00:01:17,069 --> 00:01:21,109
A wheel is a circular object that turns around an axle.

15
00:01:22,010 --> 00:01:25,030
We use it to lift or move objects.

16
00:01:25,030 --> 00:01:37,239
A wedge is an object with at least one slanting edge.

17
00:01:38,239 --> 00:01:39,959
We use it to cut objects.

18
00:01:48,040 --> 00:01:52,400
A lever is a rigid bar with a support called a fulcrum.

19
00:01:53,319 --> 00:01:56,019
We use it to lift or move objects.