Moments

Question 1

Definitions

What is a moment?

Answer 1

A moment of a force is the turning effect of a force.

to be calculated, we must identify a pivot.

Question 2

Definitions

What is a pivot?

Answer 2

A pivot is a point around which all the turning is done.

Question 3

Moments

What is the Equation for a Moment?

Answer 3

The moment of a force can be calculated by the product of the applied force & it perpendicular distance from the pivot.

Moment = Force (N) x Distance

Question 4

Moments

Factors that affect moments:

There are 2

Answer 4

1. Force
2. Distance

Question 5

Types of Moments

What are the types of moments?

Answer 5

• Clockwise moments
• Anti-clockwise moments

Question 6

POM

What is the principal of moments?

Answer 6

For a body in equilibrium, the sum of the clockwise moments equals the sum of the anti-clockwise moments

Question 7

POM

What are the 2 equations of POM?

Answer 7

• ΣCM = Σ ACM
• Σ upwards forces = Σ downward forces

Σ (sigma) is a symbol generally used to denote a sum of multiple terms.

Question 8

Equilibrium

Define Equlilbrium

Answer 8

• No turning effect is observed when moments are balanced.
• A body is therefore said to be in equilibruin when all the clockwise moments (CM) & anti-clockwise moments (ACM) are balanced.