Moments

Question 0

Moments equation

Answer 0

M = F x d
Moment x force x perpendicular distance from the force to the pivot
Nm = N x m

Question 1

Moments

Answer 1

The turning effects produced by forces

Question 2

Principle moments

Answer 2

The sum of the clockwise moments = the sum of anti-clockwise moments
This is true when the system is in equilibrium (no resultant force, no acceleration, stationary or moving at a constant speed)

Question 3

Equation for principle of moments

Answer 3

E(special)Mc = E(special)Mac
E(special)= sum 
Mc= clockwise moment
Mac= anticlockwise moment

Question 4

Whats the centre of mass

Answer 4

The position where all the weight of the object appears to act from

Question 5

On a bridge the centre of mass … when a … crosses. This happens because more force is applied to the pivot on the same side of the routmaster, so it needs to maintain an … Or the bridge will …

Answer 5

Changes
Routemaster
Equilibrium in forces
Collapse

Question 6

How does one find the centre of mass on an irregular object

Answer 6

• suspend sheet freely by a point on its edge
• suspend a plumbline from the same point
• draw a line where the string runs across the sheet
• repeat with a different point
• where the two lines meet is the centre of mass