Moments

Question 1

What is the principal of moments

Answer 1

for a system in rotational equilibrium the sum of the clockwise moments = sum of the anticlockwise moments about any point (or the pivot point).

Question 2

Examples of moments

Answer 2

1. Opening a door
2. Steering wheel
3. Opening a door handle

Question 3

Equation for moments

Answer 3

M = F x d

M = moment / Nm
F = Force / N
d = perpendicular distance from force to pivot /m

Question 4

What conditions must exist for a body to be static?

Answer 4

1 - Fr=0

2 - The summation of the moments about any point = 0

Question 5

For any body to be static…

Answer 5

In rotational equilibrium,

Σ Anti-clockwise moment about any point = Σ Clockwise moments about the same point

Σ ACM = Σ CM
F(1) x d(1) = F(2) x d(2)