Week 5 - Centre of Mass + Equilibrium Flashcards
What is the centre of mass
A conceptual point where all the mass of the body can be considered to be concentrated
How is linear motion created
The resultant force or singular force has to pass through the CoM
What happens when the resultants force isn’t through the CoM
Rotation about the CoM
What is similar between centre of mass and centre of gravity
Distribution of mass equal in all directions
What is the difference between centre of mass and centre of gravity
CoG depends on gravity CoM does not
How do we find find CoM of rigid bodies
Balance or knife edge method
What are the conditions when a system is in equilibrium
Sum of forces = 0
Sum of moments about a point = 0
What is moment about an axis
Product of a force and perpendicular distance from line of action of force to the pivot point
