Moments and centre of gravity Flashcards Preview

Physics A-level > Moments and centre of gravity > Flashcards

Flashcards in Moments and centre of gravity Deck (8)
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1

Centre of mass is a point...

where the entire mass seems to be concentrated.

2

Centre of gravity is a point...

where the entire weight of the object seems to act.

3

In Uniform gravitational field...

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

4

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)

5

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.

6

The torque of a couple is...

the rotation force or moment produced.

7

A torque of a couple=

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

8

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.