Moments and centre of gravity Flashcards

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1
Q

Centre of mass is a point…

A

where the entire mass seems to be concentrated.

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2
Q

Centre of gravity is a point…

A

where the entire weight of the object seems to act.

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3
Q

In Uniform gravitational field…

A

the centre of mass is in the same place as the centre of gravity.

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4
Q

Moment is…

A

the product of the force applied and the perpendicular distance of the pivot from the line of the action of the force. (Nm)

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5
Q

A couple of forces is…

A

pair of forces acting on a body that is equal in magnitude and opposite in direction, acting parallel to one another.

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6
Q

The torque of a couple is…

A

the rotation force or moment produced.

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7
Q

A torque of a couple=

A

force x perp. distance between lines of action of the forces

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8
Q

Equilibrium is when…

A

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.

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