A-LEVEL Physics: 4.2.1: Moments (SaveMyExams) Flashcards
1
Q
What is a Moment?
A
The Moment is the Turning Effect of a Force About a Pivot.
2
Q
When do Moments Occur?
A
Moments Occur when Forces Cause Object to Rotate About a Pivot.
3
Q
Moment = …
A
Force * Distance
4
Q
What is the SI Unit for Moments?
A
Newton Metres (Nm)
5
Q
When there is a Non-Perpendicular Force, you have to…
A
Resolve the Force using Trig etc.
6
Q
Everyday example of Moments…
A
Opening a Door.
7
Q
Why is the Door Handle Placed on the Other Side to the Door Hinge?
A
To Maximise the Perpendicular Distance, hence Maximising the Moment.
8
Q
The Principle of Moments:
A
For a System to be in Equilibrium,
Sum of Clockwise Moments About a Point = Sum of Anticlockwise Moments About a Point.
9
Q
A
