Moments and centre of gravity Flashcards
Centre of mass is a point…
where the entire mass seems to be concentrated.
Centre of gravity is a point…
where the entire weight of the object seems to act.
In Uniform gravitational field…
the centre of mass is in the same place as the centre of gravity.
Moment is…
the product of the force applied and the perpendicular distance of the pivot from the line of the action of the force. (Nm)
A couple of forces is…
pair of forces acting on a body that is equal in magnitude and opposite in direction, acting parallel to one another.
The torque of a couple is…
the rotation force or moment produced.
A torque of a couple=
force x perp. distance between lines of action of the forces
Equilibrium is when…
the sum of clockwise moments about any point provided by the force acting on the object equals the sum of anti-clockwise moments about the same point.
