Chapter 4 Flashcards
1
Q
Two forces at right angles
A
Pythag for Resultant force(R^2)
Tan(Theta) for angle
2
Q
Equilibrium
A
Resultant force is zero
Forces add up to zero
Resultant moment is zero
3
Q
Components of vectors
A
Fy = Fsin Fx = Fcos
4
Q
Changing the slope
A
At an angle to the slope: mg Parallel to slope: mgsin Perpendicular to slope: mgcos F = mgsin a= mgsin/m
5
Q
Centre of gravity
A
Point where all the weight of the object may be considered to act
6
Q
Moment of a force
A
Force x perpendicular distance of the pivot from the line of action of the force
Fxd
Fdsin
7
Q
Torque of a couple
A
One of the forces x perpendicular distance between the forces
F x 2d
