1
00:00:07,790 --> 00:00:21,170
Hi, I'm Thais and this is a door. It's a simple machine.

2
00:00:21,170 --> 00:00:32,170
I want to explain you a type of forces. This is non-contact force.

3
00:00:32,170 --> 00:00:58,149
This is a contact force. I want to explain you the effects of forces.

4
00:00:58,149 --> 00:01:03,149
Forces can make objects start moving.

5
00:01:03,149 --> 00:01:11,579
Forces can make objects stop moving.

6
00:01:11,579 --> 00:01:23,200
Forces can make objects change shape.

7
00:01:27,769 --> 00:01:35,099
Forces can break objects.