6.4 More on moments Flashcards
1
Q
what does it mean when an object in equilibrium is supported at one point only
A
the support force on the object is equal and opposite to the total downward force acting on the object
2
Q
total downward forces =
A
the support force
3
Q
how is the centre of mass of a beam shared when there re 2 support forces
A
if it is in the centre between the two supports it is split equally otherwise it depends on the distance from the centre of mass
4
Q
what is a couple
A
a pair of equal and opposite forces acting on a body but not along the same line
5
Q
what are couples often
A
clockwise and anticlockwise so they cancel eachother out
