Moments and Equilibrium Flashcards
1
Q
Lever
A
a rigid bar free to rotate around a fulcrum
2
Q
moment of a force
A
the magnitude of the force multiplied by the perpendicular distance from the fulcrum to the force
3
Q
moment equation
A
M = F⟂d
distance from fulcrum
4
Q
Force produced on other end of fulcrum
A
the load
5
Q
How to work out which way a body will rotate and with how much turning effect
A
- add up all cw and acw moments
- subtract smaller amount = net moment of force
6
Q
equilibrium
A
- when the clockwise and anticlockwise moments are equal
- when the upward forces = the downward forces (vector forces are equal)
7
Q
static equilibrium
A
not moving
8
Q
dynamic equilibrium
A
moving but not accelerating (constant velocity)
9
Q
couple
A
a pair of equal parallel forces that turn in opposite directions
10
Q
torque
A
the moment of a couple
11
Q
torque equation
A
T = f⟂d
distance between 2 forces not fulcrum
