Moments

Question 0

What do force multipliers do

Answer 0

Reduce the effort needed to move the load by increasing the distance over which it is acting

Question 1

Moment definition

Answer 1

The force multiplied by the perpendicular distance from the line of action of the force to the axis of rotation

Question 2

What are moments measured in

Answer 2

Nm

Question 3

Why are moments scalar quantities

Answer 3

Have a direction - mostly up or down

Question 4

Principle of moments

Answer 4

If an object is in balance, the sum of the anticlockwise moments = the sum of the clockwise moments

Question 5

The centre of mass/gravity simple definition

Answer 5

A point where all the weight of an object appears to act

Question 6

Centre of mass/gravity explanation

Answer 6

The weight force acts at this point, so if we support the object at this point there is no turning moment in any direction about the point, and it balances

Question 7

To find The centre of mass of a symmetrical body

Answer 7

Where the axes of symmetry cross

Question 8

If something is unstable, it has a moment that will make it topple over. When/why would this occur?

Answer 8

If the centre of mass of an object moves so that the line of action of the weight is outside the base of the object

Question 9

Factors that make an object more stable

Answer 9

• wider base

- lower centre of mass