A-LEVEL Physics: 4.1.4: Moments (Seneca) Flashcards
1
Q
What is a ‘Moment’?
A
A Moment is the Turning Effect of a Force About a Pivot.
2
Q
Moment = …
A
Force * Perpendicular Distance from the Point to the Line of Action
m = Fd
3
Q
What is the Units of Moments?
A
Newton-Metres (Nm).
4
Q
What is a ‘Force Couple’?
A
A Force Couple is a Pair of Equal & Opposite Coplanar Forces.
5
Q
What are ‘Coplanar Forces’?
A
Coplanar Forces are Forces that lie in the Same Plane (they are Coplanar). They have Equal Magnitude & Opposite Direction.
6
Q
A Force Couple has a ___ ___, but has No ___ ___.
A
Turning Effect, Resultant Force.
7
Q
Force Couples Produce a ___ ___, & therefore a…
A
Turning Effect, Moment.
8
Q
The Principle of Moments:
A
‘The Sum of Clockwise Moments = The Sum of Anticlockwise Moments’.
