Moments + Stability COPY

Question 1

Moment equation

Answer 1

Moment = force x distance to the pivot

Question 2

Unit for moments

Answer 2

Newton - metre

Question 3

If the sum of the clockwise moments equal the sum of the anti clockwise moments on an object, the object will not rotate

Answer 3

–

Question 4

Factors that affect the objects stability

Answer 4

The base area of an object

The weight of the base of an object

Question 5

What is the centre of mass

Answer 5

The centre of gravity of an object is the point through which the whole weight of the object seems to act

Question 6

How to find the centre of mass

Answer 6

Let the card hang freely from a large pun stuck into a cork; clamp the cork in a clamp stand. Hang your plum line from the same pin.
Mark the position of the plumbline by two crosses on the card. Join the crosses with a straight line drawn with a ruler.
Just as the plumbline hangs with its centre of gravity below the pivot, so also will the card. This means at the centre of gravity of the card is somewhere on the line you have marked.
To find out exactly where it is, do the process again but 90* the other way. Where these two lines meet is the centre of gravity

Question 7

Moment of a force about a point

Answer 7

Force x perpendicular distance of the pivots from the line of action of the force