Forces, Density and Pressure Flashcards
1
Q
Moment of a force
A
Product of a force and the perpendicular distance from the pivot
2
Q
Couple
A
It is a pair of forces which are equal in magnitude but act in opposite directions. Their lines of action do not meet and they produce rotation
3
Q
Torque of a couple
A
It is the product of one of the forces and the perpendicular distance between them
4
Q
Principle of moments
A
For a body in equilibrium the total clockwise moments at any given point is = the total anticlockwise moments at the same point
5
Q
What are the two conditions for equilibrium?
A
No resultant force
No resultant torque
6
Q
Define density
A
Mass per unit volume
7
Q
Define pressure
A
Force per unit area
8
Q
Upthrust
A
Force acting on an object placed in a liquid or gas.
