Section 4 - Forces And Energy Flashcards
1
Q
What has happened when a system has changed?
A
Energy has been transferred
2
Q
What has happened when work has been done?
A
A force has moved an object
3
Q
When you move an object what has work been done on?
A
The object that has been moved
4
Q
What is power?
A
The rate of energy transfer
5
Q
What is the resultant force?
A
The overall force on a point or object
6
Q
NOTE: you need to know how to do free body diagrams
A
Page 67 of the CGP Guide
7
Q
NOTE: you need to know you to do vector diagrams
A
Page 68 of the CGP guide
8
Q
The turning effect of a force is called its…
A
Moment
9
Q
If the ratio of teeth is 3:1 between a big gear and a small gear, how many turns will the big gear do when the small gear has turned once?
A
The big gear will do a 1/3 of a turn
