90 Degree and 180 Degree
45 Degree and 225 Degree
180 Degree and 270 Degree
270 Degree and 360 Degree
pitch circle
base circle
pitch curve
prime circle
Right
Wrong
(a) primary forces and couples must be balanced
(b) secondary forces and couples must be balanced
both (a) and (b)
none of these
P = W tan(? - ?)
P = W tan(? + ?)
P = W cos(? + ?)
