Ch 5 Turning Effect of Forces Flashcards
1
Q
What is the turning effect of a force also known as?
A
moment or torque
2
Q
What is the formula for the moment of a force ?
A
moment = Force X Perpendicular Distance
3
Q
In what direction can a force turn about a pivot ?
A
Clockwise and anti-clockwise
4
Q
Define the principle of moments
A
When an object is in equilibrium, the sum of clockwise moments about a pivot is equal to the sum of anti-clockwise moment about the same pivot.
5
Q
Define center of gravity.
A
It is a point in an object where the whole weight of the object seems to act.
6
Q
What makes an object more stable? (2 factors)
A
1) Lowering the center of gravity of the object
2) Increasing the base area of the object
